Massachusetts murder suspect Karen Read returned to court Monday for her trial in the death of her former boyfriend, Boston Police Officer John O’Keefe, as DNA experts and a digital forensic scientist testified for the prosecution, linking the victim to a lone hair sample found on Read’s SUV and tightening up a timeline surrounding the final moments of his life.

But under cross-examination, a witness with key new evidence for the state revealed what appears to be an exaggerated resume.

O’Keefe, 46, was found dead on Jan. 29, 2022. His then-girlfriend, the now-45-year-old Read, is accused of slamming into him with her 2021 Lexus SUV and leaving him to die on the ground in a blizzard in Canton, a suburb about 20 miles south of Boston.

Read took her car out of reverse between 12:32:04 and 12:32:12, Burgess testified, based on computer logs recovered from her Lexus.

John O’Keefe (Boston Police Department)

Burgess is expected to return to the stand on Tuesday. Read could face up to life in prison if convicted of the top charge, second-degree murder. She is also charged with drunken driving, manslaughter and fleeing the scene of a deadly accident.

She has pleaded not guilty, and her defense denies her vehicle collided with O’Keefe at all.