Prosecutors and defense attorneys in the trial of Edward Washington and Dwayne Moore are expected to give closing arguments on Tuesday.
Kimani Washington was on the stand for three days, two of them under cross examination. He says he broke the street code because a woman and child were killed.
Kimani Washington admitted he was part of a plan to rob the victims of drugs and money.
Victims’ family members took the stand on Friday to testify against the men charged with killing four people in Mattapan on September 28, 2010.
The 16 jurors visited the site of the September 2010 killings Thursday.
Two men accused of killing four people — including a toddler — in 2010 are heading to trial on murder charges Monday.
A third person has been placed under arrest in the murders of four people in Mattapan earlier this year.
The suspected gunman in the Mattapan murders was ordered held without bail Tuesday.
Five people were shot on Woolson Street in Mattapan back in September, including a two-year old boy. Four of them died.
A young mother and her young son killed in a shooting in Boston have been laid to rest.