Peggy O’Keefe testified that she got a call around 6 a.m. Jan. 29, 2022, from a friend of her son John O’Keefe’s who was with Read when she discovered the unresponsive officer on the front lawn of Brian Albert, then a sergeant with the Boston Police Department.

Karen Read’s second murder trial began Tuesday with a prosecutor saying the defendant’s own words will bolster evidence that she killed her police officer boyfriend three years ago and a defense attorney calling the case “the definition of reasonable doubt.