Driving me crazy for years. No one knows. It's a movie from the 80s where a man breaks into a mans house and puts a deadly chemical in toothpaste which makes the man using it explode. I remember cows and an entrance to an underground facility. Please help!!

What's the name of the movie where the woman puts her face on a billboard because she wants to be somebody ?

Movie about a southern women who is abused my husband and cuts his head off puts it in a suitcase and goes to hollywood to be star and gets the part of Samtha in bewitched

A young woman is raped and killed, her younger sister traumatized and mute, her lawman boyfriend guilt-ridden over not helping her. So, she comes back from the dead to set things right and to say good-bye. She kills the rag-tag gang of hooligans that has the entire town in thrall to gang members....