Lawyers in the murder trial of Karen Read are set to give their closing arguments Friday after weeks of testimony in a highly divisive case in which the prosecution’s theory of jaded love turned deadly is countered by a defense claim that a cast of tight-knit Boston area law enforcement killed a fellow police officer.

“The circumstances of his death are still under investigation,” the spokesman said, “and do not appear to be definitively known.”

It was in Dedham, outside the Norfolk County Superior courthouse, in the midst of a high-profile murder trial.