Prosecutors rested their case after calling a witness responsible for explaining exactly how the supposed collision between Karen Read's SUV and John O'Keefe took place.

Prosecutors’ crash reconstruction expert testified about the sudden acceleration Read’s SUV made and what injuries are consistent with a car crash.

In the trial of Karen Read, accused of killing John O’Keefe, defense scrutinizes crash expert's costly experiments and presentation modifications for inconsistencies.

The first witness called by Karen Read's defense explained that there were few scenarios where John O'Keefe's phone locked before Read's car accelerated in reverse.

The Karen Read case is back in a Massachusetts courtroom on Monday as the trial enters a fifth week with an 18th day of witness testimony. A forensic analyst for the prosecution is going over the movements of Read's Lexus SUV on the night in question.

Karen Read's defense team challenges murder allegations in the death of Boston Police Officer John O'Keefe, as the prosecution rests its case with key testimony.

Karen Read’s defense team will begin callings its own witnesses after the prosecution rested its case Thursday. Follow the proceedings in the live video here.

Prosecutors retrying Karen Read in the widely publicized death of her boyfriend three years ago rested their case Thursday. The defense is expected to begin making its case Friday.