Plymouth County District Attorney's Office

Authorities are investigating the fatal shooting that occurred Thursday night on Ash Street.

A man was shot and killed late Thursday night outside a home in Brockton, Massachusetts, the Plymouth County District Attorney’s Office said.

The Duxbury, Massachusetts, man accused of killing his father in June is due back in court Thursday. Jack Callahan, 19, allegedly dunked the head of his 57-year-old father, Scott Callahan, in a pond in a bid to baptize and rid him of demons on June 28 at Island Creek Pond in Duxbury. Jack Callahan pleaded not guilty to murder charges…