If Dzhokhar Tsarnaev is found guilty, as expected, defense lawyers are expected to try to spare him the death penalty by shifting much of the blame for the bombings to his older brother, Tamerlan.
The American Pharmacists Association voted to oppose participation in executions, stating that to help put a person to death violates the goals of the profession.
The prosecution called its last witness Monday in the Boston Marathon bombing trial, with defense lawyers for Dzhokhar Tsarnaev expected to wrap up within days. But sentencing could last until June.
The question of whether Dzhokhar or Tamerlan Tsarnaev built the bombs that exploded at the finish line of the Boston Marathon was a major point of the trial Thursday.
A new poll, conducted amid the ongoing Boston Marathon bombing trial, also found that minorities in the Boston area favored life in prison even more.
The legal defense team for accused Boston Marathon bomber Dzhokhar Tsarnaev says he was led astray by his older brother. On Monday, defense lawyers appeared to get some traction with that argument.