John O'Keefe's niece took the stand as the first witness of the day Wednesday in the Karen Read trial, with his nephew expected to follow.

Prosecutors played multiple profanity-laden voicemails that Karen Read left John O’Keefe on the morning he died for jurors in Read's murder trial.

The niece, who WBZ-TV will not identify by name, is now a high school junior. She was around 14 years old when John O'Keefe died. She has a younger brother who testified during the first trial but did not testify during the retrial.

Defense in Karen Read trial proposes that Boston Police Officer John O'Keefe's death might be linked to a "jealousy"-fueled fight with ATF agent Brian Higgins.

Karen Read accused John O'Keefe of cheating on her on a trip to Aruba in 2021. Prosecutors want the jury to hear more about the incident.

Footage shows 'Turtleboy' blogger Aidan Kearney yelling and gesturing at a surveillance camera in a pizza shop owned by Karen Read trial witnesses.

Jurors sitting on the high-profile case became privy to a slew of text message exchanges that showed a flirtation between the woman charged with killing her boyfriend and an ATF agent who was a friend of the dead man,