Southwestern Payroll Service, Inc. and Granite Solutions Groupe, Inc. v. Pioneer Bancorp, Inc. and Pioneer Bank

District Court, N.D. New York·Decided September 9, 2026·No. 1:19-cv-01349·Unknown

Opinion

UNITED STATES DISTRICT COURT NORTHERN DISTRICT OF NEW YORK _____________________________________________

SOUTHWESTERN PAYROLL SERVICE, INC., and GRANITE SOLUTIONS GROUPE, INC.,

Plaintiffs/ Counter Defendants,

and 1:19-CV-1349 (MAD/PJE) NATIONAL PAYMENT CORPORATION,

Intervenor Plaintiff/ Counter Defendant,

vs.

PIONEER BANCORP, INC., and PIONEER BANK,

Defendants/ Counterclaimants. _____________________________________________

APPEARANCES: OF COUNSEL:

COOPER ERVING & SAVAGE LLP MICHAEL A. KORNSTEIN, ESQ. 20 Corporate Woods Blvd., Suite 501 Albany, New York 12211 Attorney for Plaintiffs/Counter Defendants

JAYNE PETERS MCVICKER ANDREW JAYNE. ESQ. BURKE ASKEW & PARKER 401 S. Boston Avenue - Suite 2000 Tulsa, Oklahoma 74103 Attorney for Plaintiffs/Counter Defendants

GREENBERG TRAURIG, LLP CYNTHIA E. NEIDL, ESQ. 54 State Street JENNIFER TOMSEN, ESQ. 6th Floor KENDYL T. HANKS, ESQ. Albany, New York 12207 ROLAND GARCIA, ESQ. Attorneys for Intervenor Plaintiff/ Counter Defendant YOUNG/SOMMER LLC JULIE A. YEDOWITZ, ESQ. 500 Federal Street 5th Floor Troy, New York 12180 Attorney for Intervenor Plaintiff/ Counter Defendant

DLA PIPER LLP (US) ROBERT J. ALESSI, ESQ. 1251 Avenue of the Americas BEN FABENS-LASSEN, ESQ. Ste 27th Floor COURTNEY SALESKI, ESQ. New York, New York 10020 JON MICHAEL REID, ESQ. Attorneys for Defendants/ M. DAVID JOSEFOVITS, ESQ. Counterclaimants STEVE M. ROSATO, ESQ.

HODGSON, RUSS LAW FIRM MICHAEL D. ZAHLER, ESQ. 677 Broadway - Suite 401 Albany, New York 12207 Attorneys for Defendants/ Counterclaimants

Mae A. D'Agostino, U.S. District Judge:

MEMORANDUM-DECISION AND ORDER I. INTRODUCTION This case is scheduled to proceed to trial on September 28, 2026. Plaintiffs Southwestern Payroll Service, Inc. ("SWP") and Granite Solutions and Intervenor Plaintiff National Payment Corporation ("NatPay") (collectively, "Plaintiffs") have sued Defendants Pioneer Bancorp, Inc. and Pioneer Bank (collectively, "Defendants") for civil fraud and conspiracy related to Defendants' seizure of over approximately $15 million, which allegedly belonged to Plaintiffs' third-party clients for payroll tax purposes. See Dkt. No. 245. Defendants deny Plaintiffs' claims and bring numerous counterclaims against Plaintiffs for fraud and conspiracy. See Dkt. No. 259. The Court assumes the parties' familiarity with the factual allegations underlying the case and refers the parties to Plaintiffs' third amended complaint, Defendants' answer and cross claims, and the decision dated August 25, 2025, denying their motions for summary judgment. See Dkt. Nos. 245, 259, 393.1 Presently before the Court are nine separate motions to exclude expert opinions, also known as Daubert motions. See Dkt. Nos. 423–32, 442–450. For the reasons that follow, the parties' motions are granted in part and denied in part. II. DISCUSSION2 A. Legal Standard "The admissibility of expert [] testimony is governed by the Federal Rules of Evidence."

Rutledge v. Walgreen Co., 182 F.4th 168, 183 (2d Cir. 2026). Rule 702 sets forth the basic tenets for an expert opinion, requiring as follows: A witness who is qualified as an expert by knowledge, skill, experience, training, or education may testify in the form of an opinion or otherwise if the proponent demonstrates to the court that it is more likely than not that:

(a) the expert's scientific, technical, or other specialized knowledge will help the trier of fact to understand the evidence or to determine a fact in issue;

(b) the testimony is based on sufficient facts or data;

(c) the testimony is the product of reliable principles and methods; and

(d) the expert's opinion reflects a reliable application of the principles and methods to the facts of the case.

1 Plaintiffs also brought claims against Michael T. Mann and companies he partially or fully owned or controlled. Defendants brought cross claims against those same parties. Neither Mann nor his companies have appeared in the action, and they are not parties to the pending motions.

2 Citations to the parties' filings are to the page numbers generated by CM/ECF in the header of each page. FED. R. EVID. 702. "This standard requires district courts to look carefully at the qualifications and methodology of each expert." Rutledge, 182 F.4th at 184; see also Daubert v. Merrell Dow Pharms., 509 U.S. 579, 598 (1993). "Under Federal Rule of Evidence 703, an expert's opinion may be based on facts or data that are not themselves admissible, so long as 'experts in the particular field would reasonably rely on those kinds of facts or data in forming an opinion on the subject.'" United States v. Ray, 583 F. Supp. 3d 518, 533 (S.D.N.Y. 2022) (quoting FED. R. EVID. 703). "The expert is not permitted to simply transmit otherwise inadmissible facts to the jury but 'must form his own opinions by

"applying his extensive experience and a reliable methodology" to the inadmissible materials.'" Id. (quoting United States v. Mejia, 545 F.3d 179, 197 (2d Cir. 2008)) (additional citation omitted). "'[I]f the facts or data would otherwise be inadmissible, the proponent of the opinion may disclose them to the jury only if their probative value in helping the jury evaluate the opinion substantially outweighs their prejudicial effect.'" Id. (quoting FED. R. EVID. 703). Further, "experts in civil cases may, while providing otherwise appropriate expert opinions, speak to mental states, [and] provide ultimate-issue opinions . . . ." Waldman v. Palestine Liberation Org., 171 F.4th 575, 597 (2d Cir. 2026). "Federal Rule of Evidence 704(a) provides that '[a]n opinion is not objectionable just because it embraces an ultimate issue.'" Id.

"Rule 704(b) adds a caveat for opinions about mental states in criminal cases, but that 'exception does not apply in civil cases.'" Id. (quoting Diaz v. United States, 602 U.S. 526, 534 (2024)). "'The law assigns district courts a "gatekeeping" role in ensuring that expert testimony satisfies the requirements of Rule 702.'" Id. (quoting United States v. Farhane, 634 F.3d 127, 158 (2d Cir. 2011)). "'To determine whether a witness qualifies as an expert, courts compare the area in which the witness has superior knowledge, education, experience, or skill with the subject matter of the proffered testimony.'" Rutledge, 182 F.4th at 184 (quoting United States v. Tin Yat Chin, 371 F.3d 31, 40 (2d Cir. 2004)). "'Experts need not conduct studies of their own in order to opine on a topic; a review of other studies and scientific literature can be enough to qualify experts to testify and to make that proposed testimony reliable.'" Id. (quoting In re Mirena IUD Prods. Liab. Litig., 169 F. Supp. 3d 396, 412 (S.D.N.Y. 2016)). "To determine reliability, the district court may consider whether the expert's theory or technique can and has been tested; whether it has been subjected to peer review and publication; whether it has a known error rate or standards to control its operation; and its general acceptance

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Southwestern Payroll Service, Inc. and Granite Solutions Groupe, Inc. v. Pioneer Bancorp, Inc. and Pioneer Bank, (N.D.N.Y. 2026).

Southwestern Payroll Service, Inc. and Granite Solutions Groupe, Inc. v. Pioneer Bancorp, Inc. and Pioneer Bank (Southwestern Payroll Service, Inc. and Granite Solutions Groupe, Inc. v. Pioneer Bancorp, Inc. and Pioneer Bank) — published by Counsel Stack Legal Research, free access to 12M+ legal documents.

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