The suspect in the Halloween shooting at Vancouver Mall followed the victim for a short time before shooting him in the back of the head at point-blank range, according to court records.

Both suspect Travis Ward and the victim were at the mall with their families for a Halloween trick-or-treating event, according to a police affidavit.

Investigators are no closer to finding out why a man shot and killed a person at a Vancouver, Wash. mall last Thursday night.