CNN Forensic Files July 19, 2015 05:57:00
Was no forensic evidence linking him to the crime scene. gerald cowan was later convicted of manslaughter for killing his father-in-law. he served only two years in prison for that crime before he was released on parole. prosecutors believe robert cowan was one of the men seen near the mercks' home by the neighbor. based on the forensic evidence, prosecutors say robert cowan and an accomplice broke into the mercks' home through the back door. cliff merck probably went for his gun to defend himself and robert cowan grabbed the pistol and turned it on cliff. [ shots ] the men bound his wife, alm...