investigators found two floppy disks on joe snodgrass' desk which they thought might hold evidence of his complicity in his wife's murder plot. but before they checked the disks, investigators wanted to make sure they actually belonged to joe snodgrass and weren't someone else's. so they asked him to come to the interrogation room to identify them. >> joe snodgrass was in a cooperative posture. he's a law enforcement official. and so if someone is investigating, well, naturally, you try to cooperate so you can get him off the suspect list. >> as snodgrass investigated the discs, investigators were distracted. he pulled out a pair of scissors and shredded the discs. >> they tried to get the scissors away from him.