>> reporter: so instead he said he ditched mark's car at that casino, looked around for a place to dump his body. >> there's a dilapidated looking dock thing. and i got my car as close to that as possible and muscled him out and dropped him in the water. >> reporter: an area investigators had searched but never found anything. then he said he drove across the state not to his kids but to linda's house. though, he insists he did not tell her any of what just happened. didn't tell her what he'd done. >> i just said i had had a really bad day. >> reporter: when police showed up the next night, he admitted, he did try to throw out some evidence. >> what was your intent? >> i needed one more day. i was trying to not get arrested just yet. >> reporter: but of course he was arrested and charged. and now it was the prosecutor's turn to challenge his story.