.22 caliber browning and that he'd been interested in it for a very specific reason. >> he told me, well, i have a barrel that i can interchange on that that has a threaded end that i can put a suppressor on. >> reporter: silencer, that is. then an expert matched bullet casings found outside stover's house to michael oakes' gun. >> i was able to identify all three fired cartridges as have been been fired from the browning pistol. >> reporter: proof that michiel oakes' gun was fired at mark stover's house where dna showed more of mark's blood was found. blood but no body. to try to answer the question of what michiel oakes might have done with mark's body, prosecutors presented this surveillance video. shortly after 12:00 noon, october 28th, the day stover disappeared, an suv -- looked like michiel oakes' suzuki -- slowly cruising by the waterfront casino three miles from the grange. >> here's dark suv.