Update: Investigators now say a 7-year-old cousin playing with an illegal gun shot him, the Herald reports. See the comments for a statement from the DA.
Laquarrie Jefferson was shot to death shortly after 11 p.m. last night at 266 Seaver St., when three men burst into his apartment and opened fire.
"I am stunned and saddened by the news of Laquarrie's death," police Commissioner Ed Davis said. "His young life has been cut tragically short by senseless gun violence."
The Herald reports three men stormed the apartment, kicking open the door and opening fire.
The Globe has more.
In April, 2006, a 14-year-old girl was stabbed in a fight at the same address.