BOSTON – A 64-year-old man accused of mowing down a female pedestrian while driving and looking at his phone and then speeding from the scene has been identified and arrested.

John Murphy, of Dorchester, was arrested Tuesday after a 15-day investigation by the Massachusetts State Police Troop H Detective Unit. He has been charged with operating to endanger, leaving the scene of a crash that caused serious bodily injury, assault and battery with a dangerous weapon, operating while texting, tampering with evidence, operating after suspension and crosswalk violation, state police officials said.

Murphy is accused of striking a pedestrian at about 7:15 a.m. on Dec. 2. The woman, who is recovering from serious injuries, was in a crosswalk on Day Boulevard when she was struck, police said.

Murphy, who was driving a 2005 Lincoln Town Car, did not stop after the crash and he later replaced the driver’s side mirror, which had been damaged in the crash, police said.

“Evidence developed by the troopers indicates that Murphy was looking at this phone at the time he struck the pedestrian,” police said.

As part of their effort to identify the driver, police released video and photographs taken near the scene and asked for help from the public.

Murphy was arraigned on Tuesday in South Boston District Court.