He will think someone he knows will rat his ass out. If he did do it-he will or probably think someone will turn him in. He will tell someone if it did it or not if he hasn't already. Use someone good old fashion psychology.
WHY WAIT TO RACE LATER? WHEN I'LL SMOKE YOUR ASS TODAY!
Don't sweat the petty things in life....But defintely don't pet the sweaty thing!