OPINION
Justice TODD.
In this capital case, Rasheed Simpson appeals the order of the Philadelphia County Court of Common Pleas dismissing without a hearing his petition for relief under the Post Conviction Relief Act (“PCRA”), 42 Pa.C.S.A. §§ 9541-46. We affirm in part, vacate in part, and remand for further proceedings as directed.
I. BACKGROUND AND PROCEDURAL HISTORY
A. Factual Background
We recited the facts in support of Appellant’s conviction at length in his direet appeal. Commonwealth v. Simpson, 562 Pa. 255, 259-63, 754 A.2d 1264, 1266-68 [258] (2000). Accordingly, we reiterate here only those facts necessary for a proper understanding of Appellant’s claims.
On the evening of December 8, 1993, Appellant and three confederates, Allister Durrante, Malik Bowers, and an unidentified man, abducted Andrew Haynes (“Haynes” or “the victim”), a minor drug dealer also Known as “The Dread” because he wore his hair in dreadlocks, from near the intersection of 18th and Tioga Streets in North Philadelphia. They forced Haynes into a van and drove him to an apartment where their friend, Raheema Washington, resided. There, they beat the victim and demanded he give ■ them money. After Washington expelled them from her apartment, Appellant spoke with Aloysius Hall and Haynes’ brother Selvan on the phone, and demanded $20,000 within 15 minutes. If he and his confederates were not paid, Appellant threatened, they would kill Haynes. See N.T., 12/11/97, at 21 (Aloysius Hall’s testimony that the kidnapper said he “needs $20,000 in 15 minutes or the Dread is dead”). After repeated phone calls between the kidnappers and Haynes’ family, Haynes was killed by four bullets to the back of his head. His body was found in a vacant lot at 18th and Somerset Streets in North Philadelphia.
Appellant was not arrested until July 1996, after Washington gave a statement to the police implicating him in the crime. He was charged with murder in the first degree, kidnapping, robbery, conspiracy, and possession of an instrument of crime. He then proceeded to a jury trial jointly with one of his co-conspirators, Malik Bowers.1
At trial, the evidence connecting Appellant to the crime was as follows. First, Washington testified that Appellant had been in the group of kidnappers who brought the victim to her apartment on the evening .of December 8, 1993. N.T., 12/12/97, at 13-18. Second, Hall testified that the kidnapper who spoke with him on the phone referred to a robbery against Hall which Appellant had committed and, when Hall responded by asking “if it [was] Rasheed?” the kidnapper responded affirmatively. N.T., 12/11/97, at 21. Third, a week after the murder, Montgomery County Police Officer James Slavin investigated a car which lacked a license plate in the parking lot of the Cheltenham Mall in Cheltenham, Pennsylvania, and discovered a firearm. After Officer Slavin and other officers staked out the car, Bowers, Washington, and others returned to the car; Bowers refused to cooperate with officers and was arrested. Officer Slavin’s notes identify the other passengers as Washington, Cameron Thompson, Will Shepard, and the driver, Medeya Clark. Id. at 112-13. However, none presented identification, and Washington testified that Appellant was one of the passengers. N.T., 12/12/97, at 26.2 Appellant’s theory of the case was that he was not involved in the crime.
On December 17, 1997, Appellant and Bowers were both convicted of the aforementioned charges. At the joint penalty phase hearing, the Commonwealth cited three statutory aggravating factors in arguing that a capital sentence was appropriate: Haynes had died while being held for ransom; Appellant had a significant history of violent felony convictions; and Appellant had been convicted of another homi[259] cide.3 See 42 Pa.C.S.A. §§ 9711(d)(3), (9), (11). Appellant argued a capital sentence was inappropriate because of his age, his character, and the circumstances of the crime. See 42 Pa.C.S.A. §§ 9711(e)(4), (8). On December 22, 1997, the penalty-phase jury determined the Commonwealth had established all three aggravating factors listed above. The jury considered Appellant’s age as a mitigating factor4, but determined the three aggravating factors outweighed that mitigating factor and, thus, sentenced him to death.
Subsequent to Appellant’s initial conviction, we heard his direct appeal and affirmed both his conviction and his judgment of sentence. Sim/pson, supra. In so doing, we rejected Appellant’s challenges to the weight and sufficiency of the evidence offered to support his conviction; the admission of a witness’ statement about Appellant’s alleged propensity for violence; the capital murder instruction offered to the jury; the prosecuting attorney’s penalty-phase inquiry regarding the possibility Appellant would eventually receive a pardon; and the prosecuting attorney’s guilt-phase summation characterizing the murder of Haynes as an “execution.” Appellant’s trial counsel continued to represent him on direct appeal.
Appellant filed a pro se petition for relief under the PCRA on September 17, 2001. Counsel was appointed and filed an amended petition on July 9, 2002, and a supplemental amended petition on January 29, 2003. The Commonwealth filed a motion to dismiss on June 24, 2004. Appellant filed a reply on April 12, 2005, and, on October 18, 2005, the PCRA court granted the Commonwealth’s motion without a hearing, concluding Appellant’s petition raised no genuine issues of material fact.5 The instant appeal followed.6
In its opinion explaining its dismissal of Appellant’s petition without a hearing, the PCRA court denied relief as to all 15 of the arguments Appellant presses in the instant appeal, as well as one argument which Appellant appears to have abandoned.7 We discuss the PCRA court’s rationales below.8
[260] B. Legal Background
Before turning to the merits of the 15 issues raised by Appellant on appeal, as several of his claims concern ineffective assistance of counsel, we begin with a summary of the legal framework governing PCRA petitions raising such claims. As noted above, Appellant’s trial counsel continued to represent him on direct appeal. Accordingly, though Appellant’s direct appeal was litigated prior to our decision in Commonwealth v. Grant, 572 Pa. 48, 813 A.2d 726 (2002), Appellant did not have an opportunity to raise claims of trial counsel’s ineffectiveness on direct appeal. In this context, the proper framework in which to consider Appellant’s issues is the “performance and prejudice” analysis set forth in Strickland v. Washington, 466 U.S. 668, 104 S.Ct. 2052, 80 L.Ed.2d 674 (1984), and Commonwealth v. Pierce, 515 Pa. 153, 157, 527 A.2d 973, 975 (1987).
The defendant’s right to counsel guaranteed by the Sixth Amendment to the United States Constitution and Article I, § 9 of the Pennsylvania Constitution is violated where counsel’s performance “so undermined the truth-determining process that no reliable adjudication of guilt or innocence could have taken place.” Commonwealth v. Rios, 591 Pa. 583, 600, 920 A.2d 790, 799 (2007) (internal quotation marks omitted). In this regard, we apply a three-pronged test for determining whether trial counsel was ineffective, derived from our application in Pierce, 515 Pa. at 157, 527 A.2d at 975, of the performance and prejudice test articulated by the United States Supreme Court in Strickland, 466 U.S. at 687, 104 S.Ct. 2052. The Pierce test requires a PCRA petitioner to prove: (1) the underlying legal claim was of arguable merit; (2) counsel had no reasonable strategic basis for his action or inaction; and (3) the petitioner was prejudiced — that is, but for counsel’s deficient stewardship, there is a reasonable likelihood the outcome of the proceedings would have been different. Pierce, 515 Pa. at 158-59, 527 A.2d at 975. If a petitioner fails to prove any of these prongs, his claim fails. Commonwealth v. (Christopher) Williams, 594 Pa. 366, 378, 936 A.2d 12, 19-20 (2007). Moreover, counsel is presumed to be effective, and a petitioner must overcome that presumption to prove the three Strickland/Pierce factors. Commonwealth v. Singley, 582 Pa. 5, 19, 868 A.2d 403, 411 (2005).
Where a PCRA petition does not raise a “genuine issue[ ] of material fact,” the reviewing court is not required to hold an evidentiary hearing on the petition. Commonwealth v. Clark, 599 Pa. 204, 212, 961 A.2d 80, 85 (2008); Pa.R.Crim.P. 909(B). Thus, to entitle himself to a hearing, an appellant must raise an issue of fact, which, if resolved in his favor, would justify relief. Commonwealth v. D’Amato, [261] 579 Pa. 490, 513, 856 A.2d 806, 820 (2004) (citations omitted). Here, the PCRA court concluded Appellant’s petition raised no genuine issues of material fact, and so dismissed it without a hearing. We review this determination for an abuse of discretion. Commonwealth v. (Ronald) Collins, 585 Pa. 45, 70, 888 A.2d 564, 579 (2005).
II. DISCUSSION
Initially, we consider the Commonwealth’s arguments, offered throughout its brief, that Appellant does not adequately state or develop his claims and allegations of ineffectiveness, and, accordingly, those allegations are waived.9 The Commonwealth asks us to conclude that most of Appellant’s allegations of ineffectiveness are, essentially, boilerplate claims of ineffectiveness. The Commonwealth asserts that this is inadequate to support our review of the merits of the ineffectiveness claim.
The PCRA court did not endorse or even discuss the Commonwealth’s assertions of waiver, and did not engage in any procedural default analysis. A judge “shall” order amendment of a defective PCRA petition, Pa.R.Crim.P. 905(B), thus, we may infer the PCRA court did not agree that the instant petition or advocacy was inadequate. Therefore, in this matter, we decline to find waiver based on any alleged inadequacies. Accordingly, we proceed to consider Appellant’s claims for relief.
A. Appellant’s Batson Claim
Appellant asserts the Commonwealth violated his rights under Batson v. Kentucky, 476 U.S. 79, 106 S.Ct. 1712, 90 L.Ed.2d 69 (1986), by utilizing its peremptory challenges in a manner which discriminated against African-Americans10 and women, and that his trial counsel was ineffective for failing to challenge the Commonwealth’s allegedly discriminatory use of its peremptory challenges. To show a Batson violation, an appellant must generally demonstrate his particular factual situation satisfies the well established test laid out by the United States Supreme Court’s opinion in that case: First, the defendant must make a prima facie showing that the prosecutor has exercised peremptory challenges on the basis of race. Second, if the requisite showing has been made, the burden shifts to the prosecutor to articulate a race-neutral explanation for his peremptory challenges. Finally, the trial court must determine whether the defendant has carried his burden of proving purposeful discrimination. Batson, 476 U.S. at 96-98, 106 S.Ct. 1712.11
However, where, as here, a Bat-son claim arises only in the context of an allegation of ineffective assistance of counsel, years after the voir dire is conducted, the defendant is not entitled to the benefit [262] of the burden of persuasion as to whether there is a race-neutral explanation for the prosecutor’s use of peremptory challenges. Commonwealth v. Uderra, 580 Pa. 492, 511-12, 862 A.2d 74, 86 (2004). Rather, the defendant bears the burden throughout the inquiry and must demonstrate “actual, purposeful discrimination by a preponderance of the evidence,” as well as meeting the “performance and prejudice” standard for demonstrating counsel’s ineffectiveness noted above. Uderra, 580 Pa. at 513, 862 A.2d at 87; Commonwealth v. Jones, 597 Pa. 286, 292-97, 951 A.2d 294, 298-301 (2008).
To satisfy his burden, a defendant raising a Batson claim must “make an adequate record specifically identifying the race of all the venirepersons who had been removed by the prosecution, the race of the jurors who served, or the race of jurors acceptable to the Commonwealth who had been stricken by the defense,” since otherwise we lack an adequate record upon which to evaluate the Batson claim. Commonwealth v. Spence, 534 Pa. 233, 247, 627 A.2d 1176, 1182-83 (1993).
Here, Appellant has provided the necessary information under Spence. See Brief for Appellant at 15-17; Appendix at 144-50. Thus, we consider “whether Appellant’s proffer, if believed, would establish actual, purposeful discrimination,” mindful that “it is exponentially more difficult [in the PCRA context] to perform a reasoned assessment concerning the presence or absence of purposeful discrimination.” Uderra, 580 Pa. at 513-14, 862 A.2d at 86-87.12
Appellant points out that, of the Commonwealth’s 18 peremptory challenges, 13 were used on African-Americans, and 11 on women; African-Americans made up only 42% of the venire pool but 72% of the Commonwealth’s challenges, while whites made up 53% and 27%, respectively. Further, Appellant argues in several cases the Commonwealth struck one venireperson and not another, and Appellant alleges that the only difference between the two was race. Appellant provides 3 specific examples. In a fourth case, Appellant argues the Commonwealth conducted only a “perfunctory” voir dire before striking a juror. Appellant avers the Commonwealth’s actions were consistent with those recommended on the infamous McMahon tape13, and that his trial counsel was ineffective in failing to raise and litigate the issue at trial and on direct appeal. Finally, Appellant asserts the trial court erred in issuing a conclusory determination that no Batson violation occurred on the basis that six African-Americans appeared on the jury.14 [263] See PCRA Court Opinion, 11/28/05, at 5. While Appellant’s Batson claim itself is waived, his derivative claim that his trial counsel was ineffective for failing to contest the above errors is cognizable under the PCRA. See Commonwealth v. Hackett, 598 Pa. 350, 364 n. 15, 956 A.2d 978, 986 n. 15 (2008).
With respect to the McMahon contention, we have repeatedly emphasized that the McMahon training tape does not suffice to demonstrate a Batson violation in a particular case, particularly where, as here, “the prosecutor at an appellant’s trial was someone other than McMahon, and the time of the appellant’s trial was temporally remote from the creation of the videotape.” Jones, 597 Pa. at 303, 951 A.2d at 305. Here, Appellant was brought to trial more than ten years after the McMahon tape was created, and the prosecutor was not McMahon. Thus, the McMahon tape is inadequate to demonstrate actual, purposeful discrimination.
The remainder of Appellant’s proffer — one instance of perfunctory voir dire of a juror the Commonwealth struck, a greater percentage of strikes used against African-American jurors than whites, and three cases where the Commonwealth struck African-American jurors but did not strike white jurors with some common characteristics — is similarly inadequate to prove actual, purposeful discrimination by a preponderance of the evidence. The Commonwealth was entitled to 20 peremptory challenges, see 234 Pa. Code § 634, which it did not exhaust even though numerous minorities and female jurors remained in the venire pool. This militates against finding even a prima facie case for a Batson violation, let alone “actual, purposeful discrimination.” See Commonwealth v. Hardcastle, 519 Pa. 236, 245, 546 A.2d 1101, 1105 (1988).
Appellant’s argument that the Commonwealth violated Batson by its decision to strike venirepersons Juanita Martin, Paula Smith, and Valerie Lipford similarly fails to demonstrate actual, purposeful discrimination. Appellant asserts that the Commonwealth struck Martin for equivocating about her willingness to impose the death penalty, but did not strike white juror Patricia Anick for expressing similar hesitation. Moreover, Appellant asserts the Commonwealth struck Smith and Lipford, while not striking white veni-reperson Joanne Hehn, even though all three had family members in the penal system shortly before the trial in this case.
As the Commonwealth points out, however, the venirepersons in question were different in other, arguably material, ways. Most tellingly, both Anick and Hehn had family members in law enforcement, which could have legitimately provided a race-neutral reason for the prosecutor to choose not to challenge them even though a veni-reperson’s equivocation about her ability to impose capital punishment and a venire-person’s having family members with recent criminal convictions constitute legitimate grounds for peremptory challenges. Accordingly, we find no evidence of “actual, purposeful discrimination” here.
Finally, Appellant asserts the Commonwealth conducted a perfunctory voir dire of venireperson Janice Jones, asking only three questions. Under Morse v. Hanks, 172 F.3d 983, 985 (7th Cir.1999), he avers such a perfunctory voir dire followed by a [264] peremptory challenge suggests discrimination.
However, the prosecutor’s voir dire of Jones covered seven exchanges and approximately two complete pages in the transcript, N.T., 12/3/97, at 71-73, which was not unusually brief.15 Moreover, as the Commonwealth argues, Jones twice could have been reasonably construed to express impatience with the prosecutor’s voir dire during that brief period, see id. at 72, on the basis of which the prosecutor could reasonably and for race-neutral reasons have decided to strike Jones. Under such circumstances, Appellant cannot show “actual, purposeful discrimination” on the basis of one admittedly brief voir dire followed by a peremptory challenge. See Morse, 172 F.3d at 985 (suggesting in dicta that a perfunctory voir dire would not establish even a prima facie case of discrimination where the excused juror “had given an answer that would expose a clear basis for the state to want to remove him from the pool with a peremptory challenge”). Accordingly, we conclude the PCRA court did not err in dismissing this claim.
B. Exculpatory or Impeachment Evidence Unavailable at Trial
1. Brady Claim
Next, Appellant asserts' his rights were violated under Brady v. Maryland, 373 U.S. 83, 83 S.Ct. 1194, 10 L.Ed.2d 215 (1963).16 Therein, the Supreme Court held that a defendant has a federal constitutional right to receive material exculpatory evidence in the prosecution’s possession.
To demonstrate a Brady violation, Appellant must show that: (1) the prosecution concealed evidence; (2) which was either exculpatory evidence or impeachment evidence favorable to him; and (3) he was prejudiced by the concealment. Commonwealth v. Paddy, 569 Pa. 47, 64-65, 800 A.2d 294, 305 (2002); Strickler v. Greene, 527 U.S. 263, 281-82, 119 S.Ct. 1936, 144 L.Ed.2d 286 (1999). To show prejudice, he must demonstrate a “reasonable probability that, had the evidence been disclosed to the defense, the result of the proceeding would have been different.” Clark, 599 Pa. at 219, 961 A.2d at 89 (internal quotation marks omitted). A rea sonable probability for these purposes is one which “undermines confidence in the outcome of the trial.” Kyles v. Whitley, 514 U.S. 419, 434, 115 S.Ct. 1555, 131 L.Ed.2d 490 (1995) (quoting United States v. Bagley, 473 U.S. 667, 678, 105 S.Ct. 3375, 87 L.Ed.2d 481 (1985)).
Furthermore, and relevant to the instant claims, Brady evidence may not be cumulative of other evidence, Commonwealth v. Lambert, 584 Pa. 461, 473, 884 A.2d 848, 856 (2005), cannot have been equally available to the defense, Commonwealth v. Spotz, 562 Pa. 498, 526-27, 756 A.2d 1139, 1154 (2000), and cannot have been discoverable through the exercise of reasonable diligence, Commonwealth v. Sattazahn, 597 Pa. 648, 680, 952 A.2d 640, 659 (2008).
Appellant asserts three separate Brady violations. First, he argues the prosecution understated the victim’s criminal record. Second, he avers the prosecution withheld the fact that Commonwealth witness Aloysius “Stanley” Hall had felony [265] charges for distribution of narcotics nolle prossed two months before he testified at Appellant’s trial. Third, he argues the prosecutor withheld evidence that Tracena Copper was a paid government witness at the time of his trial, and that the Commonwealth was aware at the time of his trial that Copper both used and sold narcotics, but chose not to charge her with any offense.
The PCRA court rejected these claims. The court noted that two pieces of evidence in question — Haynes’ arrest for robbery and possession of a controlled substance with intent to deliver, and Commonwealth witness Tracena Cooper’s status as a crack dealer and marijuana user — would have been inadmissible, and consequently concluded Appellant could not demonstrate he was prejudiced by the failure to disclose either piece of evidence. The court also rejected Appellant’s claim that the Commonwealth violated Brady by failing to disclose that Commonwealth witness Stanley Hall had an open drug case, which Appellant alleged was dropped because of Hall’s testimony. The court noted Appellant had offered no evidence of such an agreement beyond speculation, and denied the claim.
a. The Victim’s Criminal History
Initially, Appellant argues that the Commonwealth suggested the victim was a marijuana dealer, when in fact the victim also dealt crack cocaine. Moreover, he avers that, at the time of the crime, the victim was facing charges for a variety of felonies, including robbery, -aggravated assault, possession of a controlled substance with intent to deliver, and conspiracy. The Commonwealth, he asserts, withheld this evidence, which would have cast doubt on the Commonwealth’s theory that Appellant killed the victim because he did not have any money. Appellant further notes that evidence the victim sold crack would have buttressed a statement by another witness to police that there was a lot of conflict among the local drug dealers, including those of Jamaican origin, and so suggested other possible perpetrators.
As the Commonwealth notes, however, Appellant’s co-defendant raised the issue of the victim’s crack cocaine sales before the jury in the cross-examination of Clayton Duncan and Aloysius Hall. N.T., 12/11/97, at 6-12, 62-63. Thus, the defense and the jury were aware the victim had sold crack cocaine, vitiating any Brady concerns because any additional evidence that the victim had sold crack was available to the defense and, regardless, would have been cumulative. See Lambert, supra. Accordingly, the PCRA court correctly dismissed this claim without a hearing.17
b. Favorable Treatment for Aloysius Hall
Appellant notes that Hall had felony drug distribution charges pending at the time he originally inculpated Appellant in the instant homicide, and that those charges were nolle prossed two months before Hall testified at his preliminary hearing. Appellant avers the Commonwealth was obligated to disclose this information under Brady.
The PCRA court found that Appellant proffered “no evidence of a deal between the witness and the police” to exchange testimony in Appellant’s trial for favorable [266] treatment, and so he could not demonstrate a Brady violation occurred. PCRA Court Opinion, 11/28/05, at 6.
The duty to disclose under Brady encompasses impeachment evidence as well as exculpatory evidence. Giglio v. United States, 405 U.S. 150, 92 S.Ct. 763, 31 L.Ed.2d 104 (1972). However, for a defendant to be entitled to a new trial based on the prosecution’s failure to disclose information relating to a witness’ credibility, the defendant must “demonstrate that the reliability of the witness may well be determinative of his guilt or innocence.” Commonwealth v. Morales, 549 Pa. 400, 414, 701 A.2d 516, 523 (1997) (citing Commonwealth v. Moose, 529 Pa. 218, 232, 602 A.2d 1265, 1272 (1992)); see also Giglio, 405 U.S. at 154, 92 S.Ct. 763.
Here, Hall testified that he recognized Appellant on the phone when the kidnappers called, because Appellant reminded him of a previous robbery Appellant committed against him. He later identified Appellant to police. See N.T., 12/11/97, at 22, 64. Accordingly, Appellant avers that Hall’s testimony was “critical.” Brief for Appellant at 31.
Appellant relies on Commonwealth v. Strong, 563 Pa. 455, 761 A.2d 1167 (2000), to challenge the PCRA court’s decision. There, we held that “any evidence of an understanding or promise [of leniency] regarding ... testimony” was relevant. Id. at 464, 761 A.2d at 1172. Accordingly, he avers, he could have used the evidence that the charges against Hall were dropped two months before his preliminary hearing to cast doubt on Hall’s credibility.
However, as the Commonwealth points out, this case is more closely analogous to Commonwealth v. Champney, 574 Pa. 435, 832 A.2d 403 (2003). Brief for the Commonwealth at 30. In that case, we held that, where a witness’ sentence was reduced and an appellant offered a “mere assumption that something such as , a promise to assist in reducing his federal sentence must have been made,” id. at 450, 832 A.2d at 412, he had not shown a Brady violation. See also Morales, supra. As Appellant has, like the Champney and Morales appellants, simply suggested that under the circumstances a deal between Hall and the Commonwealth “must have been made,” without proffering any evidence, the PCRA court correctly dismissed this claim without a hearing.
c. Tracena Copper’s Status as a Paid Informant
Appellant avers that Commonwealth witness Tracena Copper was a paid informant with a history of uncharged narcotics offenses, and that the prosecutor inaccurately represented to the contrary. Brief for Appellant at 32-33. Without citation to authority, Appellant asserts the PCRA court erred in concluding that he was not prejudiced because he was aware that Copper was a Commonwealth informant and information about her past use and sale of narcotics would have been inadmissible. Though he again neither refers to nor attempts to meet the Moose standard for Brady violations in the context of information about a witness’ credibility, Appellant asserts that Copper’s credibility was “a crucial fact for the jury to weigh” because, she testified Appellant had access to a gun she provided his co-defendant, Malik Bowers. Id.
Initially, the prosecuting attorney appears only to have averred that Copper was an unpaid informant with respect to this particular case, not globally. See N.T., 12/12/97, at 155. The Commonwealth submits that Copper was paid by federal authorities, and Appellant has not shown that information was in the Com[267] monwealth’s possession. See Brief for Appellant at 32-33 (apparently conflating “the prosecutor,” i.e., the Philadelphia District Attorney’s office, with “the government,” i.e., the United States Attorney’s office).
While the prosecution is responsible for ensuring the government’s Brady responsibilities are met as regards evidence under the control of the police, Commonwealth v. Burke, 566 Pa. 402, 781 A.2d 1136 (2001); Kyles v. Whitley, 514 U.S. 419, 115 S.Ct. 1555, 131 L.Ed.2d 490 (1995), we have not held Commonwealth prosecutors responsible under Brady for information held by federal authorities and Appellant does not provide any justification for doing so here. See, e.g., Burke, 566 Pa. at 413, 781 A.2d at 1142 (“[UJnder Kyles, the prosecution’s Brady obligation clearly extends to exculpatory evidence in the files of police agencies of the same government bringing the prosecution.” (emphasis added)). Indeed, prior to Burke, we had issued an “unbroken line of decisions ... holding that the prosecution does not violate Pa.R.Crim.P. 305(B)(1)