I saw on a news here; http://bitcoinist.com/hacker-returns-17m-worth-of-stolen-ethereum/#  how a hacker returned $17m worth of Ethereum which was stolen from CoinDash (a tool aiming to help users manage, track and analyze their crypto assets).
I have been thinking what moved him to return the coins because he wasn't tracked for the Ethereum he stole.
Guys, what's your take on this? What do you think that stirred his emotions to return the coins? Probably this could be used on other hackers to return stolen coins too.