day from when melvin started the affair with teresa harshman. >> mr. harshman is the kind of man that no one was going to tell him what to do. no one was going to take his property. he became very vengeful, very very angry. he was not the kind of person that was going to allow his wife to return home and try to rebuild their relationship. there was no forgive and forget. it was i will get my revenge. and that's what he did. >> prosecutors say the crime was premeditated. the evidence suggests that harshman drove to melvin's home, found him inside the barn. then shot and killed him with his new .25-caliber pistol. [ gunshot ] the .25-caliber round probably didn't exit melvin's body. prosecutors believe harshman drove home and returned later on his motorcycle.