Why did he return 1000btc to theymos instead of running away with it?

Why didn't he return all the other bitcoin he held in escrow?

Cuz theymos has enough BTC to hire a hitman. Everyone else is now poor enough to not be able to afford one..
Thats why
its one of best point on this thread by any one even raffle winner is also cannot afford to hire hitman for his money