 | SALEM — A man reputed to be the “sergeant at arms,” or enforcer, for the North Shore chapter of the Hells Angels motorcycle gang was sentenced to state prison after admitting to violent assaults on two men last December.
James T. “Jamie” Costin, 51, of Lynn, will serve 1 1/2 to 3 1/2 years in prison for the assaults outside the Fat Cacus, a restaurant and bar on Route 1 in Lynnfield.
 |  |