Much of the testimony focused on the cracked taillight that the police say led them to suspect that Ms. Read hit her boyfriend, John O’Keefe, with her S.U.V.

Several new attorneys, Karen Read’s media interviews and the firing of the lead investigator have combined to change the dynamics of her retrial.

Karen Read arrives at the Norfolk Superior Courthouse alongside her defense team for the fourth week of testimony in her murder trial in Dedham, Massachusetts on Monday, May 12, 2025.