cowley's original rat and mouse poison. >> he remembered mr.coggins coming in looking for some sort of poison to kill varmints of some kind. >> i think he didn't buy it that day but he came back several days later and bought more than one bottle. i don't recall how many. >> forensic document examiners analyzes the cremation request orders signed by the norton sisters and a $30,000 check the sisters made out to scoggin shortly before their death. they concluded the documents were forgeries. it was written during the time of the death which made it even more suspicious because the ladies were extremely ill at this time and they wasn't in the stage of just giving away $30,000 because they were death deathly ill. >> prosecutors believe that scoggin set his sights on the norton sisters almost from the minute he met them. the norton sisters liked scoggin and he would often eat meals and stay overnight in their hillside mansion. prosecutors think scoggin poisoned them after he learned the sisters planned to include him in their will. as a mortician, s