The Karen Read trial is back in court Tuesday for a sixth day of witness testimony with a cellphone expert back on the stand for cross-examination expected about Jen McCabe's Google search and John O'Keefe's movements the night of his death.

The murder trial of Karen Read, who is charged in the death of her boyfriend, Boston Police Officer John O’Keefe, is continuing on Tuesday.

Karen Read looks toward her defense attorney Robert Alessi, as special prosecutor Hank Brennan questions Ian Whiffin, a digital intelligence expert with Celebrite, about the data on John O'Keefe's iPhone during her murder retrial in Norfolk Superior Court in Dedham, Mass., Monday April 28, 2025. (Pat Greenhouse/The Boston Globe via AP, Pool) AP