Sorry, you and others are going thru this. You're a better man than me. A long time ago, I would've gone or dispatched people that I work with to bang on his door, demand the items or money. If he ignored my attempts, then talk to neighbors, call or shown up at his job, even staked out his property until he came outside. Hey, but I'm a sweet, loveable a**hole like that.
Good luck!!!
LACrimeGuy