Trailer: Don’t Answer the Phone! (1980)
Former Vietnam vet and photographer Kirk Smith is a crazed killer who stalks the streets of Los Angeles, picking up young women and strangling them in lurid fashion.
He repeatedly contacts Dr. Lindsay Gale, the psychologist on a radio show. He targets Dr. Gale’s patients, commits a murder while on the phone to her show (forcing her to listen to the victim’s cries), and eventually goes after Dr. Gale herself. Two goofy policemen track him down.