Karen Read pleaded not guilty to murder charges in the death of Boston police officer John O’Keefe and is facing a retrial after a jury was unable to reach a verdict last year.

A digital forensics expert at Karen Read’s second murder trial acknowledged Tuesday that data from her car doesn't necessarily confirm it was involved in a collision the morning her boyfriend was killed.

Read attorney Robert Alessi noted that Shanon Burgess’s bio page on his company’s website lists him as holding a bachelor’s degree although he does not currently hold that degree.