Capital punishment in Massachusetts was a legal form of punishment from 1620 to 1984.
In 1982, Massachusetts people approved a legislatively referred constitutional amendment providing that no constitutional provision shall be construed as prohibiting the death penalty, with 60 % of voters in favor. 
Nevertheless, Massachusetts capital punishment statute was struck down in 1984 as violation of due process, because it allowed a death sentence only when the defendant had pleaded not guilty. The state legislature never passed a statute to reinstate capital punishment, despite support from then-governor Michael Dukakis.
Following the homicide of a police officer in Yarmouth in April 2018 and a police sergeant in Weymouth in July 2018, Massachusetts Governor Charlie Baker stated that he supports capital punishment for defendants convicted of murdering a police officer.  
Federal crimes committed in Massachusetts may still be subject to the death penalty. For example, Dzhokhar Tsarnaev was sentenced to death by a federal court on May 15, 2015, for his role in the Boston Marathon bombing.
- "Massachusetts Death Penalty Constitutional Status, Question 2 (1982)". ballotpedia.org. Retrieved June 20, 2017.
- "In wake of Sean Gannon's killing, Gov. Charlie Baker 'supports the death penalty' for cop killers in Massachusetts". MassLive.com. Advance Publications. April 18, 2018. Retrieved October 28, 2018.
- Croteau, Scott J. (July 18, 2018). "Discussion of death penalty for cop-killers reemerges after shooting of Weymouth Sgt. Michael Chesna". MassLive.com. Advance Publications. Retrieved October 25, 2018.
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