Testimony continued Friday in the murder trial of Karen Read, who is accused of backing her SUV into her Boston police officer boyfriend, John O’Keefe, and leaving him for dead.

The defense called crash reconstruction expert Matthew DiSogra as their first witness to the stand in order to contradict reconstruction experts who testified for prosecutors.

During his testimony, DiSogra said “none of” Read’s SUV techstream events “were triggered by a collision.”

Here’s how Friday unfolded.

Read questioned about fired investigator Michael Proctor as she leaves courthouse — 4:50 p.m. Link copied

By Ava Berger, Globe Correspondent

Karen Read left the courthouse around 4:20 p.m. and was immediately asked by reporters why the defense is not calling former State Trooper Michael Proctor to testi

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