throw mothballs in the holes. You should be able to find the entrance hole and where he came out. My dad has a mole killer apparatus and I have set that contraption for him and haven't had to deal with the aftermath.......but it is like a guillatine for moles........ewwwwwwwwwwwwww. I got good at mole hunting around here.......lol. The moles must have gotten wind of that contraption because they haven't been around since last year... 8-)