Karen Read's defense presents expert testimony that Officer O'Keefe's fatal injuries resulted from falling backward, with facial wounds caused by a separate impact.

Judge Beverly Cannone also denied the defense team’s motion for a mistrial based on what Read’s lawyers called “intentional misconduct” from prosecutor Hank Brennan.

For the second time in less than a week, Karen Read's defense team called for a mistrial in her retrial. Here's what else happened on day 29.

Attorneys in Karen Read’s second murder trial are questioning their list of witnesses, moving to a dog bite expert brought forward by the defense.