the gun of test-fired into a tub of water. as bullets go through the barrel, the lens and grooves which make the bullet spin leave marks on the outside of the bullet. >> they were designed with a certain direction of twist, a certain number of land and grooves, a certain measurement for those land and grooves. so those are intentionally put in by the manufacturer. >> surprisingly when the bullets from cliff's gun were compared to the bullets from cliff's autopsy, they did not match. investigators checked all of the local pawn shops and discovered that the cowen brothers had pawned some of alma merck's jewelry. with a search percent, police found several other items belonging to the mercks in the cowens' possession. >> he had a wallet. he had two social security checks which he was trying to