The second murder trial of Karen Read, whose case has sparked a national debate on police accountability and won her legions of devoted fans, will begin Tuesday with both sides laying out conflicting theories of how her Boston police officer boyfriend ended up dead.

Here’s a look at a timeline of the entire case, from the key 6-hour period surrounding O’Keefe’s death and the ensuing legal battle over who is responsible.

Renowned criminal defense attorney Mark Geragos joins NewsNation as the high-profile Karen Read case returns to court. Opening statements in her retrial begin soon, in the same Massachusetts courthouse,