in all three cases, the common thread was the telephone. either the killer took the victim's telephone or used the cords to restrain his victim. this led to speculation the killer asked his victims for assistance. >> everything he touched he took with him. those were his trophies. it didn't take much for him after he killed them to wipe down the doorknob. he knew everything he touched. >> when residents of baton rouge learned a serial killer was on the loose, they took every possible precaution. at night the streets were all but empty. but it wasn't enough. several months later, the killer struck again. 23-year-old dene colomb never returned home from visiting her mother's grave. her body was discovered 26 miles