investigators found two floppy disks on joe snodgrass's desk which they thought might hold evidence in his complicit with his wife's murder plot. before they checked the disks, investigators wanted to make sure that they actually belonged to joe snodgrass and weren't someone els. so she asked him to come to the interrogation room to identify them. >> snodgrass was in a cooperative posture. he was a law enforcement official so someone is investigating, well, naturally you try to cooperate and help so you can get him off the suspect list. >> as snodgrass examined the disks, investigators were momentarily distracted and he pulled out a pair of scissors and shredded them. now, they wrestled the scissors