Commonwealth v. Delarosa, SJC 13444

Delarosa was convicted of first-degree murder for strangling Wanda Rosa after discovering a letter suggesting she had been unfaithful and questioning his paternity of their son. 1
The couple had a long on-and-off relationship, a young son, and a prior abuse-prevention order that followed earlier violence by Delarosa against Rosa. 2
On the night of the killing, Delarosa found the letter, later confronted Rosa after she returned home, and strangled her while their son was present. 3
Police found Rosa dead from strangulation, DNA from Delarosa matched samples from her neck, and Delarosa later confessed after being located in California. 4
At trial, Delarosa sought a voluntary manslaughter instruction based on heat of passion and reasonable provocation, and the judge gave it only after Delarosa testified. 5
The jury convicted Delarosa of first-degree murder by extreme atrocity or cruelty, and the judge imposed life without parole. 6

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether the Commonwealth's evidence required a voluntary manslaughter instruction 7	Delarosa says the letter and confrontation could support reasonable provocation	Commonwealth says the evidence showed no objective reasonable provocation	No; the judge properly denied the instruction 8
Whether the letter's contents prevented cooling off before the killing 9	Delarosa says the letter provoked him and he never cooled off	Commonwealth says he cooled off by sleeping and waiting until night	Any provocation from the letter had cooled off 10
Whether Rosa's confrontation immediately before the killing was adequate provocation 11	Delarosa says Rosa's words confirmed paternity lies and provoked him	Commonwealth says mere words and speculation cannot justify provocation	No; there was no new inflammatory information from Rosa 12
Whether relief was warranted under G. L. c. 278, § 33E 13	Delarosa seeks a new trial or reduced verdict	Commonwealth says the record shows no miscarriage of justice	No relief under § 33E 14

Commonwealth v. Escobar, 493 Mass. 694 (2024) (preserved instructional error reviewed for prejudicial error 15)
Commonwealth v. Acevedo, 446 Mass. 435 (2006) (instruction required if any view of the evidence supports manslaughter 16)
Commonwealth v. Carrion, 407 Mass. 263 (1990) (defining voluntary manslaughter and the instruction standard 17)
Commonwealth v. Bins, 465 Mass. 348 (2013) (voluntary manslaughter arises from frailty of human nature 18)
Commonwealth v. Fratantonio, 495 Mass. 522 (2025) (reasonable provocation must be objectively and subjectively reasonable 19)
Commonwealth v. Groome, 435 Mass. 201 (2001) (reasonable person must not have cooled off and defendant must not have cooled off 20)
Commonwealth v. Ronchi, 491 Mass. 284 (2023) (words alone usually are not enough provocation 21)
Commonwealth v. Mercado, 452 Mass. 662 (2008) (exception for statements conveying sudden inflammatory information 22)
Commonwealth v. Gonzalez, 465 Mass. 672 (2013) (ordinary activity after provocation supports finding of cooling off 23)
Commonwealth v. Smith, 460 Mass. 318 (2011) (later attack after ordinary activity is not immediate emotional eruption 24)
Commonwealth v. Andrade, 422 Mass. 236 (1996) (distinguished; manslaughter instruction issue not decided there 25)