Defense attorney Alan Jackson began his closing argument Friday by repeating three times: “There was no collision.” He told the jury that Read is an innocent woman victimized by a police cover up in which law enforcement officers sought to protect their own and obscure the real killer.

The jury in the Karen Read trial heard drastically different closing arguments Friday before deliberations began.

Jury deliberations in the Karen Read retrial began Friday after weeks of testimony in the high-profile murder case that centered on the prosecution's theory of a rocky relationship that turned fatal and the defense's claim of a police cover-up.

Karen Read, accused of killing Boston police officer John O’Keefe, will not testify in her retrial, which could go to the jury by Friday. Experts have disputed the collision theory and cause of death,