looked empty. when he broke in through the back door, he woke the homeowner, dorothy donovan. cannon was afraid she'd be able to identify him, so he used the screwdriver he took from charles' truck and stabbed charles' mother to death in a drug fueled rage. he left his palm print and dna inside the home. charles saw him on the property and called police, convinced that cannon had somehow followed him. cannon claims it was just a coincidence that he chose dorothy's house. he was unaware of any keck between dorothy and charles. >> investigators asked him if anyone else was with him, if he knew charles holden, did anybody