Witness’s brother testifies in killings
Their cousin is charged in Mattapan deaths
One of the big questions that came out of this week’s testimony from the key witness in a quadruple killing is how credible the jury would find him. Yesterday, a Suffolk prosecutor sought to buttress the statements of Kimani Washington, who participated in the robbery that led to the homicides, by putting his younger brother on the stand. Charles Washington, 31, began testifying yesterday against his cousin, Edward Washington, and Dwayne Moore, who are charged with first degree murder.