Our dumb criminals: Police say armed robber returned to scene to retrieve phone she'd dropped

Boston Police report arresting a woman they say pushed an elderly woman to the floor of a South End pharmacy at knife point and took her purse Sunday night.

Police say officers didn't have to go far to arrest Mary Gallas, 37, because as they were still on scene, she returned to the CVS at 400 Tremont St. to look for her phone, which she dropped during the robbery. Officers had picked up the phone, along with the knife they say Gallas dropped right outside the store as she ran away, police say. The victim's purse, meanwhile, was recovered from the Arlington Street bridge.

Gallas was charged with armed robbery of somebody over 60 and assault and battery on a victim over 60.

Innocent, etc.