UPDATE: WHDH reports a man with a connection to Rahim was arrested in Everett.
A 26-year-old Roslindale man under a terror watch left law-enforcement officers no choice this morning but to shoot him, Police Commissioner William Evans said.
Evans said surveillance video from the small shopping plaza on Washington Street at Enneking Parkway showed a Boston police officer and an FBI agent retreating when Usaama Rahim began going after them with a "large military knife" shortly after 7 a.m. Read more.