CNN highlights about a dozen witnesses called over the last eight weeks, whose testimony illuminated key pieces of the theories presented by prosecutors and Read’s defense.

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

A broken taillight. A dead cop. A bombshell admission. The jury is now deliberating over whether Karen Read killed John O'Keefe.

Read flashed the sinister smirk as graphic images of John O’Keefe’s bruised and mangled body were revealed to the jury.

Karen Read proposed that she personally select which of the jurors would serve as alternates in her murder trial — an idea the judge denied.