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.

The dense snow and blizzard-like conditions outside the Massachusetts home are gone. But the mystery of who may have killed Boston Police Officer John O’Keefe on a frigid night in Canton lingers as jurors visited the house near where his body was found.

Friday's jury view comes a day after Judge Beverly Cannone cut testimony short over "confusion" with witnesses.