NEWMAN, Chief Judge:
Appellant was convicted by a jury of first-degree murder while armed, first-degree murder, and carrying a pistol without a license.1 On this appeal he contends that the trial court erred both by failing to conduct a proper inquiry upon his pretrial request for the appointment of co-counsel as well as by denying that request. These contentions require that we consider: (1) the question of the trial court providing co-counsel as a means of implementing the Sixth Amendment right to effective assistance of counsel; (2) the nature of the inquiry which the trial court must make in resolving a request for the appointment of co-counsel; and (3) the principles applicable to the trial court’s proper exercise of discretion in appointing co-counsel. We find that the trial court failed to conduct a proper inquiry and thereby committed reversible error.2
On the afternoon of July 20, 1976, at a gathering at the home of Mrs. Ethel Graham in the District of Columbia, the appellant and the decedent, Raymond Battle, had a discussion that turned into a heated argument. Appellant left the gathering for approximately two hours during which time he placed a pistol on the front seat of his car. During this same time, Battle armed himself with a pistol taken from his car. Appellant then drove up to Mrs. Graham’s home as Battle was leaving. Upon seeing each other, the argument continued. At this point the evidence is conflicting, but suffice it to say that appellant shot Battle once in the head killing him and drove off. Battle’s pistol was found on the street less than one foot from Battle’s outstretched arm. Appellant voluntarily surrendered himself to the police on the morning of July 21, 1976.
It was the government’s contention that this was a killing with premeditation and deliberation. The defense’s theory was self-defense.
Approximately two weeks before the commencement of trial, trial counsel requested a continuance so that the court could appoint additional counsel. Toward this end, the appellant, who had been in preventive detention since his arrest, waived his right to a trial within the statutory limit of sixty days.3 Excerpts from that hearing follow:
COURT: [Defense Counsel], have you completed your pre-trial discovery in this matter? .
DEFENSE COUNSEL: I not only have, but I think [the Assistant United States Attorney] has been more cooperative than any other United States Attorney. I have met with him in the course—
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DEFENSE COUNSEL: The most cooperative of the Assistant United States Attorneys that I have dealt with in any case.
In this case I believe at this point the decision is, and I have discussed this fully with Mr. Pierce, to go forward to trial.
However, Mr. Pierce would like to waive his right to have the trial within the statutory 60 days. The reason for this will become apparent in a moment.
[1239]*1239I have explained to him fully that he has the right to put the Government to its proof by this Friday or next Monday. And he understands that, and he wishes to waive that right for a period of approximately 30 days. . . . The reason for this waiver, Your Honor, is that I have explained to Mr. Pierce that although I have had two years of trial experience in this Court, both felony and misdemeanor, I feel that it would be advisable if the case is going forward to trial, for there to be a senior experienced attorney in the case as well.
I did not ask for this at the time of arraignment. I was not certain where this case was going.
I feel that in view of the most serious nature of the charge involved, it is imperative that a second counsel be appointed in this case.
* * * * * *
I believe my own trial preparation is substantially completed. And the senior attorney whom I consult on the case would be able to go forward on to trial with far less than perhaps a first-degree murder case would normally entail on his part.
In response, the trial court asked for a proffer from the government of its evidence. The prosecutor outlined in detail the evidence the government intended to introduce.
PROSECUTOR: Your Honor, the deceased was a man by the name of Raymond Battle, and he knew the defendant in this case. They grew up together in North Carolina, Rockie Mountain, North Carolina.
On July 20th, 1976, Tuesday, there were a number of persons visiting at the home of a lady by the name of Ethel Graham, and everybody knew everybo'dy else. There came a time at approximately 8:00 o’clock that night when the defendant and Mr. Battle got into an argument. The argument had to do with the fact that Mr. Pierce had loaned his car to a person named Roscoe Hudson, and Mr. Hudson had got a ticket because he was driving without a driver’s license. In any event the deceased said to the defendant, “You shouldn’t loan your car to people who don’t have drivers’ licenses.” And Mr. Pierce, according to the witnesses started to argue with the deceased. And at one point the deceased finally said, “Look I know the real reason you are arguing with me. You think I have my eye on your wife.” And at this point the defendant is quoted as saying: “I’m going to take care of you when I get off parole.” And the deceased said, “Well, why don’t we do it right now.” At this point the defendant left and got into the car and drove away. And ten minutes later the deceased walked down to his car and got out a .38 calibre pistol and put it in his belt and sat on the front porch for a couple of hours, and then he said, “I have to go to work. I’m going to leave.” He left with a man named James Hudson. He walked down to the car, and a number of people remained on the front porch. And as Mr. James Hudson and the deceased got into the deceased’s car, the defendant pulled up in his car, pulled out a gun and pointed it at the deceased and said, “repeat what you said.” And at this point the witnesses said the deceased was seeking cover and at this point the defendant fired one shot hitting the deceased in the back of the head, the left side of the ear from which the deceased died.
This is a preventive detention case. The defendant has a prior conviction for bank robbery in the mid 1960’s in North Carolina.
That is basically the case, Your Honor.
The Government’s evidence and argument will be that it was a cold blooded killing according to the several witnesses. And premeditation and deliberation came from the fact that there was an argument between the two men. The defendant left and secured a gun and came back without provocation and killed this man.
At this point, the court addressed trial counsel:
[1240]*1240COURT: Now, [Defense Counsel], you have previously been acquainted with this version of the facts as alleged by the Government at this time?
DEFENSE COUNSEL: That is correct, Your Honor.
COURT: I would think under such circumstances [Defense Counsel], you would be more than competent and qualified and able to go forward insofar as the preparation and presentation of the defendant’s defense in this matter.
Even after this show of confidence by the court in trial counsel’s ability to handle the case, trial counsel persisted:
DEFENSE COUNSEL: Your Honor, if at any point in this case I question my own competence, I would vacate myself. My concern is not with my competence but with the term of experience I have had. I feel in view of the fact that if this case does not go to trial — and I should point out for the record that [the Assistant United States Attorney] has made a plea offer of second degree murder while armed. If this case does go to trial and in view of the fact that Mr. Pierce would get, if Mr. Pierce were convicted of first-degree murder, he would get a mandatory maximum of 20 years which he does understand. I feel in view of that, Your Honor, the appointment of a second counsel who has had substantial experience in felony one is called for.
I might point out to the Court that this is not a request or decision that I made lightly. I have struggled with this quite a bit with the last status, and I just want the Court to know that this request or decision is not one that I make lightly.4
At this point, the court granted trial counsel’s request to approach the bench. Again, this time out of the hearing of the appellant, counsel stressed his need for a second attorney.
DEFENSE COUNSEL: Your Honor, for the Court’s information I have talked with other attorneys and several judges both of this Court and one judge in the District Court on this point. Obviously first-degree murder is a capital offense, and if the Court is concerned with the financial aspect of the case, quite frankly from this moment I wouldn’t accept another penny. It would all go to the attorney if the Court so direct.
My concern here ... is not that I don’t feel competent to present the case to the jury, but because of the seriousness of the case, I frankly would like the advice of senior counsel.
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COURT: You mean primarily for the purpose of offering you some consultation and advice; or primarily for the purpose of the actual trial of the case?
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DEFENSE COUNSEL: I think it is the actual trial. It might well be that after spending a number of hours with the attorney, should the Court appoint an attorney, and this attorney should say . you don’t have a case. I hesitate to take this case to trial with the penalty involved at trial if judgment should go against the defendant based merely only on two years of trying cases in this Court.
* * * * * *
COURT: [I]t is rather difficult to accomplish what you have requested except by appointing other counsel in the case for the defendant. You see, I don’t know how to accomplish it otherwise. And the only reason that would be done, in my judgment, is if there were reasonable indications that the defendant otherwise [1241]*1241would be without competent counsel in this case.
Now, I have not seen anything that would indicate that that is presently the case, thereby justifying the taking of that action.
The court expressed its concern that additional counsel would be reluctant to enter the case when all the preliminary work had already been done by trial counsel. Despite this concern, trial counsel renewed his request:
COURT: How do you suggest that I solve that problem? Would you suggest I remove you from the case? Would you suggest that I appoint someone else? If so, who?
DEFENSE COUNSEL: You see, I don’t know who. Your Honor, is it not possible to appoint a second attorney in this case?
COURT: Who should that be?
DEFENSE COUNSEL: I can’t proffer to the Court who that would be based on the fact I have had only really yesterday to try to talk to other attorneys who might be available.
I recognize, Your Honor, that I’m putting the Court at a bit of a difficult position.
I would not want to be entirely removed from this case for the simple reason I feel I have been associated with it from the inception. And I feel I have assets which the defendant can use.
COURT: I really don’t know . . . I think maybe I had better think about this a little bit more, and think about the practical aspect of how it should be accomplished.
You see, if I could say that the defendant is presently without competent counsel, the solution would be simple.
DEFENSE COUNSEL: I understand that, Your Honor.
COURT: Or if I could say that it is necessary for additional counsel to be appointed to assist you, you see, so as to maintain that situation, the solution would be simple. But to bring someone in now, and whom I would presume to be somewhat of a very dubious position, in terms of who is in charge of the case; and you have got to understand that an attorney would be reluctant to enter this case under the circumstances.
DEFENSE COUNSEL: I was about to say, Your Honor, my request might be more properly phrased: Could you appoint another counsel to assist? But I recognize asking a man of senior experience to come in and assist puts a substantial strain on an attorney. And it would be an unusual attorney who could undertake that.
The court was then asked to postpone the matter for a week so that trial counsel could speak to attorneys about assistance. The appellant was not questioned about the matter except as to the waiver of his right to trial within sixty days.
The Assistant United States Attorney then volunteered the following comments:
PROSECUTOR: Just for the record, I have never had a trial with [Defense Counsel]. I have had a number of pretrial conferences with him in this case, and that is one sign of competence to a prosecutor, and that he get as much discovery as possible. And I can categorically say that [Defense Counsel] has been in my office on several occasions, and he has got the Grand Jury minutes, and he has total command of the facts of the case. And he has total command of the issues from an advantage point. And as a prosecutor I have seen far and few attorneys that have been as diligent over pre-trial preparation as [Defense Counsel] has been in this case.
One week later on September 21, 1976, while appellant was in the courthouse cell block, counsel withdrew his request for additional counsel. The transcript of that day is as follows:
DEPUTY CLERK: United States versus Mr. William H. Pierce.
COURT: Is this gentleman in the cell block . . . ?
DEPUTY CLERK: Yes, Your Honor. I have called the cell block.
[1242]*1242COURT: All right, sir .
TRIAL COUNSEL: Mr. Pierce is downstairs I have spoken to him, and I was also speaking with [the Assistant United States Attorney]. As the Court may recall this case is up to ascertain my request on counsel.
I would like to advise the Court that I have spoken at length with my client today, and we have decided to proceed with me as counsel in this case.
If the Court would like to bring him in to verify this, I can represent as an officer of the Court that he is satisfied.
I have spoken to other counsel — The Court may recall my question of competence and experience that we spoke of this at length at the bench; and I am satisfied at this point that the experience that I have is adequate to deal with this case at trial.
COURT: Very well. This matter will be continued pursuant to the previous setting the trial on November 2nd.
DEFENSE COUNSEL: November 2nd?
COURT: Yes.
DEFENSE COUNSEL: Does the Court need to question Mr. Pierce directly-
COURT: No, sir, your representations are completely adequate for that purpose
DEFENSE COUNSEL: Thank you, Your Honor, I will now talk to him in the cell block downstairs.
The right to counsel has been deemed “fundamental and essential to a fair trial,” Gideon v. Wainwright, 372 U.S. 335, 340, 83 S.Ct. 792, 794, 9 L.Ed.2d 799 (1963), but more than the presence of counsel is needed to effectively meet the mandate of the Sixth Amendment. It is the right to effective counsel that is deemed essential. See McMann v. Richardson, 397 U.S. 759, 90 S.Ct. 1441, 25 L.Ed.2d 763 (1970). When the court fails to appoint counsel who is competent to properly represent a defendant, given the particular circumstances of an individual case, the right to a fair trial under the Due Process Clause of the Fifth Amendment is also implicated. See Powell v. Alabama, 287 U.S. 45, 53 S.Ct. 55, 77 L.Ed. 158 (1932); Gideon v. Wainwright, supra. These rights, like other constitutional safeguards “are to be jealously preserved for the benefit of the accused.” Glasser v. United States, 315 U.S. 60, 67, 62 S.Ct. 457, 463, 86 L.Ed. 680 (1942). The duty rests “[u]pon the trial judge ... of seeing that the trial is conducted with solicitude for the essential rights of the accused.” Id. at 71, 62 S.Ct. at 465. It is the trial court’s duty to use “sound and advised discretion and with a caution increasing in degree as the offenses dealt with increase in gravity,” Patton v. United States, 281 U.S. 276, 312-13, 50 S.Ct. 253, 263, 74 L.Ed. 854 (1930), to ensure the integrity of the trial and all the concomitant proceedings. See Glasser v. United States, supra, 315 U.S. at 71, 62 S.Ct. 457, in which Patton is also cited.
In keeping with the court’s duty to safeguard the defendant’s right to effective assistance of counsel, the District of Columbia Criminal Justice Act of 1974, D.C.Code 1978 Supp., §§ 11-2601-09, was passed. This statute calls for a plan to provide legal representation to indigent defendants in criminal cases. In accordance with the statute’s mandate, the Joint Committee on Judicial Administration promulgated in November 1974 the “Plan for Furnishing Representation to Indigents under the District of Columbia Criminal Justice Act” (Plan). This Plan allows the court, not only to appoint counsel where “a person is financially unable to obtain adequate representation . . ,’’ Plan, § IV, but, “[i]n the interests of justice . . . [to] substitute one appointed counsel for another at any stage of the proceeding.” Id. The Plan also provides that “[i]n an extremely difficult case, where the court finds that it is in the interest of justice to appoint two attorneys to represent one defendant, . two attorneys may be appointed.” Id.5
[1243]*1243Thus, the court is given two alternatives when faced with a pretrial request for additional counsel. If it decides that the case is extremely difficult, the court may appoint additional counsel. On the other hand, “in the interest of justice” the court may substitute one appointed counsel for another even where the court finds the case not to be an “extremely difficult” one within the meaning of the Plan. In making this decision, the court must construe the phrase “extremely difficult”. Since the legislative history of the statute is scant and basically uninformative on this point,6 the trial court must be guided by the plain meaning of the phrase. In any event, the determination can be made only after an inquiry that establishes the nature and complexity of the case. The exercise of discretion in this regard to be proper, “must be guided by considerations capable of rational formulation,” Berryman v. United States, D.C.App., 378 A.2d 1317, 1320 (1977), and not exercised “arbitrarily or wilfully, but with regard to what is right and equitable under the circumstances of the law, and directed by the reason and conscience of the judge to a just result.” Langnes v. Green, 282 U.S. 531, 541, 51 S.Ct. 243, 247, 75 L.Ed. 520 (1931). Accomplishment of this end depends upon there having been collected a body of information upon which the trial court can make its decision. “An informed choice . . . requires that the trial court’s determination be based upon and drawn from a firm factual foundation.” Johnson v. United States, D.C.App., 398 A.2d 354, 364 (1979). Only from this foundation can we be assured that the trial court’s discretionary determination was essentially “rational” and “right and equitable under the circumstances.” The just ra-suit is then inextricably dependent upon the trial court’s being informed of all the relevant factors pertinent to the making of its decision. See United States v. Lewis, 157 U.S.App.D.C. 43, 54, 482 F.2d 632, 643 (1973). Only a sufficient inquiry could form the principled basis for the proper exercise of this discretion. See Punch v. United States, D.C.App., 377 A.2d 1353, 1359 (1977). In the words of Mr. Justice Frankfurter, “We must not invite the exercise of judicial impressionism. Discretion without a criterion for its exercise is authorization of arbitrariness.” Brown v. Allen, 344 U.S. 443, 496, 73 S.Ct. 397, 441, 97 L.Ed. 469 (1953) (separate opinion). See generally Johnson v. United States, supra. If, after an appropriate inquiry, the court finds that this case is not extremely difficult, then it must decide whether counsel presently representing the defendant can adequately meet the demands of a proper defense and provide effective assistance of counsel.7
In the case at bar, we are presented with a similar contention as was the subject of our holdings in Monroe v. United States, D.C.App., 389 A.2d 811 (1978), and Farrell v. United States, D.C.App., 391 A.2d 755 (1978). In those cases, we held that where the trial court is faced with a pretrial claim of ineffective assistance of counsel, the trial court has a “duty to ensure that the assistance thereby rendered to an accused comports with at least the minimum level of competence consistent with our standards of the fair administration of justice.” Monroe v. United States, supra at 816. We adopted the McMann v. Richardson standard of performance of counsel, “that effective representation by counsel [must be] [1244]*1244‘within the range of competence demanded of attorneys in criminal cases.’ ” Monroe v. United States, supra at 819, quoting McMann v. Richardson, supra, 397 U.S. at 771, 90 S.Ct. 1441. In adopting this standard, we found that the court was under a constitutional duty to make a sufficient inquiry on the record to determine the nature and scope of the Sixth Amendment pretrial claim. In addition, the court must make appropriate findings of fact. We did not delineate the exact contours of the inquiry that would satisfy the commands of the Sixth Amendment since the inquiry “is necessarily dependent upon the circumstances presented in each individual case, and thus must be committed to the sound discretion of the trial court.” Id. at 821.
The necessity of the inquiry mandated by our holdings in Monroe and Farrell arises from a pretrial assertion of a claim by the defendant of ineffective assistance of counsel. Likewise, where a defendant requests the appointment of co-counsel, an inquiry by the court is mandated. The nature and scope of such an inquiry turns on the basis for the request for co-counsel. Where such a request is based solely on the claim that an additional attorney is necessary to meet the rigors of an “extremely difficult case” with its concomitant degree of required preparation and presentation, an inquiry sufficient to satisfy the court that the case fits the standard of “extremely difficult” may well be enough. Conversely, however, where there is a suggestion that the appointment of co-counsel is necessary to safeguard the defendant’s Sixth Amendment right to effective representation by counsel, a fundamentally identical claim is thereby being made as was dealt with in Monroe and Farrell. In such cases, the type of inquiry mandated by Monroe and Farrell must be conducted. Since the time necessary to ascertain the defendant’s thoughts concerning his attorney’s need for assistance — or replacement — is not too much to require of the court to ensure a well-reasoned decision and a complete record for review, we have required the court to make an inquiry of the defendant when necessary. Monroe v. United States, supra at 821. We believe in the case sub judice that this sort of inquiry was in fact necessary because the record is devoid of the defendant’s views concerning his attorney’s claim of inexperience. The defendant did not bring his own complaint before the court either personally or through counsel. The record shows only counsel informing the court first of his inexperience and fears concerning trial presentation ‘and then of his change of heart. Thus, the defendant’s views which would be of record if he had initiated the request appear nowhere in these proceedings. Additionally, while the court and counsel for both sides conferred at the bench during the first hearing, the defendant who had the most to gain or lose from any decision was in effect ignored.
This is not the first time that we have mandated a personal inquiry of the defendant. We have required that the defendant be personally interrogated so that the record shows the defendant’s own affirmative waiver of his right to assistance of counsel, Gibson v. District of Columbia, D.C.App., 221 A.2d 715 (1966), his waiver of his right to a jury trial, Hawkins v. United States, D.C.App., 385 A.2d 744, 746 (1978); Banks v. United States, D.C.App., 262 A.2d 110, 111 (1970); Jackson v. United States, D.C.App., 262 A.2d 106, 108-09 (1970), his entering a plea of guilty or nolo contendere, Bettis v. United States, D.C.App., 325 A.2d 190, 193 (1974); Durantes v. United States, D.C.App., 309 A.2d 321, 321-22 (1973), his desire to be represented by counsel who also represents a codefendant, Lord v. District of Columbia, D.C.App., 235 A.2d 322, 323 (1967), and we have approved of such a procedure with respect to the defendant’s waiver of a double jeopardy defense. Mason v. United States, D.C.App., 346 A.2d 250, 252 (1975). In short, these decisions reflect a concern by this court that, in certain instances, the accused must be fully informed not only of fundamental guarantees — which only exist to protect the accused — but of court proceedings that are basic to the accused’s ability to make informed decisions about strategically important matters, and thus aid the court in its own decision-making role.
[1245]*1245After the trial court conducts the type of inquiry that we mandate and concludes that the claim is valid, it may provide relief either by appointing co-counsel or by appointing new counsel.
In the case at bar, once trial counsel announced his inability to handle the proceedings unassisted, a substantial question as to the constitutional integrity of the proceedings was raised for the court’s consideration. The court was then under a duty to make an inquiry of the defendant as well as his counsel to determine whether an additional or a substitute counsel should be appointed. The trial court promptly and rightly inquired into the nature and complexity of the case based upon the defense’s as well as the prosecution’s proffers. While recognizing its duty to protect appellant’s Sixth Amendment right to effective assistance of counsel, the court tentatively made the decision that his case did not require the appointment of an additional attorney. Once the court tentatively made the decision that this was not an “extremely difficult case,” there was no inquiry sufficient to determine whether counsel could effectively represent the appellant “within the range of competence demanded of attorneys in criminal cases.” McMann v. Richardson, supra 397 U.S. at 771, 90 S.Ct. at 1449.
The court failed to ask any questions of defense counsel to elucidate what background and experience he had with first-degree murder cases, as well as the direction of his anticipated defense. The court instead stated its belief that counsel “would be more than competent and qualified and able to go forward insofar as the preparation and presentation of the defendant’s defense in this matter.” There having been no inquiry, there were no facts of record to support this statement.
The court also failed to make inquiry of the appellant to determine whether or not he was satisfied with his attorney even though it had two opportunities to question him. At the September 14 status hearing, not only was the appellant not questioned, but the major portion of the discussion between the court and counsel took place at the bench out of the defendant’s hearing.8 At the status hearing of September 21, when counsel withdrew his request for additional counsel, the defendant was not even present in court. He was, in fact, in the courthouse cell block and could have easily been brought up by court order so that a proper inquiry could be made.
Thus, when the court allowed the withdrawal of the request for additional counsel, it had no data from either the defendant or his counsel upon which to assess the request for additional counsel or to make an informed decision as to the advisability of trial counsel’s proceeding without assistance. See Farrell v. United States, supra at 762. The trial court thus failed in its responsibility to “protect the right of an accused to have the [effective] assistance of counsel.” Glasser v. United States, supra 315 U.S. at 71, 62 S.Ct. at 465 reaff’d in Holloway v. Arkansas, 435 U.S. 475,98 S.Ct. 1173, 1179, 55 L.Ed.2d 426 (1978).
Reversed.
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