There are some self-inflicted wounds by investigators in the case," says a former federal prosecutor who watched opening statements on Tuesday for Karen Read's retrial.

The prosecution and defense offered vastly different facts and theories as Karen Read's second murder trial got underway Tuesday.

Karen Read pleaded not guilty to murder charges in the death of Boston police officer John O’Keefe and is facing a retrial after a jury was unable to reach a verdict last year.

After nine months of anticipation, Read’s second murder trial in the death of Boston police officer John O’Keefe began Tuesday with opening statements and the testimony of a paramedic and one of Read's friends.

The second murder trial of Karen Read, whose case has sparked a national debate and won her legions of devoted fans, has begun.