State Police investigating hit-and-run crashes in Braintree and Somerville that left man dead, another injured By John R. Ellement Globe Staff,Updated April 13, 2021, 8:23 a.m. Email to a Friend A 42-year-old Boston man was fatally injured in a hit-and-run incident that took place on Interstate 93 southbound in Braintree early Tuesday, one of two crashes State Police are currently investigating. Around 4:25 a.m., the man was walking near Exit 6 when he was hit by at least one vehicle that fled the scene, David Procopio, State Police spokesman, said in a statement. âThe vehicle or vehicles that struck the victim did not stop and fled the scene,â Procopio wrote. Troopers are trying to develop a description of the vehicle or vehicles involved, he said.