Commonwealth v. Marrero, 945 N.E.2d 284

Jose Costoso was murdered February 17, 2005 in the Wendy's parking lot in Springfield; Marrero was charged with and convicted of premeditated murder in the first degree after a jury trial.
Gonzalez testified that Marrero drew a gun and said, 'I’m going to kill you,' before Costoso was shot; Costoso’s death was by gunfire at close range.
Witness Rosa Cruz identified Costoso’s attackers and later identified Marrero as the shooter; Garces, Reyes, and Gonzalez provided corroborating testimony and a cooperation agreement was reached with Gonzalez.
Forensic evidence included gunshot residue on Marrero’s jacket cuff allegedly matching Seiller & Bellot ammunition; shell casings at the scene bore that manufacturer’s insignia.
Defense challenged Freehling’s gunshot-residue methodology as unreliable; the trial judge admitted the evidence for cross-examination, and the issue was argued on appeal.
Marrero challenged the denial of his motion for a new trial and an evidentiary hearing regarding whether his right to testify was validly waived, and challenged alleged ineffective assistance of his counsel in closing argument and joint-venture instructions.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Right to testify at trial	Waiver of testify right valid; affidavits insufficient to show invalid waiver.	Counsel failed to inform that the decision to testify was Marrero’s alone; waiver not voluntary/intelligent.	No reversible error; waiver voluntary and intelligent; evidentiary hearing not warranted.
Ineffective assistance in closing argument	Closing statements improperly prejudiced the jury by aligning with the prosecution and trivializing the burden of proof.	Statements were improvident but did not create substantial likelihood of miscarriage of justice; properly cured by charge and overall context.	No substantial likelihood of miscarriage; no reversible error.
Joint venture instruction	Joint-venture liability required separate findings if relied on; insufficient evidence of co-perpetrators firing the gun.	Evidence supported joint-venture liability; jury could infer participation and intent.	Evidence sufficient to support defendant’s participation with intent; rational juror could convict.
Admissibility of gunshot-residue evidence	Forensic testing linking residue on Marrero’s jacket to ammunition supports guilt.	Methodology discredited as unreliable; improper science for admissibility.	Evidence admissible; cross-examination permitted; trial judge did not abuse discretion.

Commonwealth v. Lucien, 440 Mass. 658 (2004) (standard for evidentiary-hearing on new-trial motion; credibility of affidavits)
Commonwealth v. Denis, 442 Mass. 617 (2004) (new-trial procedures; evidentiary hearing when substantial issue shown)
Commonwealth v. Degro, 432 Mass. 319 (2000) (waiver of the right to testify; importance of adequate waiver proof)
Commonwealth v. Wright, 411 Mass. 678 (1992) (standard for assessing whether statements likely influenced jury)
Commonwealth v. Bonds, 424 Mass. 698 (1997) (trial counsel closing-argument considerations; jury influence)
Commonwealth v. Ferreira, 373 Mass. 116 (1977) (appropriate focus on reasonable-doubt standard during closing)
Commonwealth v. LeBlanc, 364 Mass. 1 (1973) (counsel competence not guaranteed perfect advocacy)
Commonwealth v. Cook, 438 Mass. 766 (2003) (waiver analysis connected with counsel’s advice and defendant’s actions)
Commonwealth v. Coonan, 428 Mass. 823 (1999) (ineffectiveness standard; weighing likely jury belief)
Commonwealth v. Zanetti, 454 Mass. 449 (2009) (joint venture sufficiency; rational juror could convict)