Inn of the Frightened People (1971)

After returning home from the funeral of their youngest daughter, who was brutally raped and murdered, a family tries desperately to put the tragedy behind them. When they discover that the police have released the man suspected of the crime, from lack of evidence, they enlist the help of a friend whose daughter was killed by the same suspect and hatch a plan to "teach the guy a lesson." Unfortunately, the plan is ill-conceived and hastily executed with unexpected and disastrous results for all concerned.