Trial by Terror (1983)

There's an intruder in the house... You get a gun... You do what you have to...

A couple moves into a new home and find success and happiness, but soon their dream becomes a nightmare when they hear chilling voices in the night, vandalous attacks and a faceless, nameless menace threatens to destroy them. The law won't help, and when an intruder is shot and killed, their ordeal has just begun.