State Police report Johnette Sims, 46, of Dorchester, died around 10:30 p.m. on Saturday when hit by a drunk driver on Morton Street at Canterbury Street, across from the VFW post.

State Police say Anthony Buchanan, 39, of Dorchester, was driving erratically at a high rate of speed towards American Legion Highway when he hit the victim in a crosswalk, stopped briefly, then drove away, towards American Legion Highway.

Buchanan turned himself in around 1 a.m. on Sunday to Boston police at the B-3 station on Blue Hill Avenue. Boston police found his blue 2016 Dodge Charger, rented from Enterprise in Dorchester, not long after.

Buchanan is expected to be arraigned in West Roxbury Municipal Court on Tuesday on charges of operating under the influence, leaving the scene of a fatal crash, speeding and marked-lanes violation.