Crash analyst testified about John O’Keefe’s arm injuries in Karen Read retrial. Here’s how the day unfolded.

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 trial was off Thursday after days of testimony about dog bite analysis, and Chloe, the dog, was at the center of the proceedings .

Crash analyst Daniel Wolfe testified that Read’s taillight damage was “inconsistent” with striking John O’Keefe, and faced sharp questioning from prosecutor Hank Brennan.

Here’s how today unfolded.

Testimony ends for the week — 3:52 p.m. Link copied

By Travis Andersen, Globe Staff

On redirect, Alan Jackson again played the clip where the dummy’s arm is struck in reverse at 24 m.p.h. in the testing.

Analyst Daniel Wolfe said he reviewed the footage at full speed and frame-b