[CodesInChaos]

One possible way to implement this: Have on betting pool per person. When betting cryptographically commit to a time interval for predicted death time. After death bettors have limited time to reveal the time interval they bet on. Split pool among correct bets weighted by 1/interval-length.

Making it easy to hire an assassin anonymously is why I find privacy preserving coins like zcash scary, despite valuing my privacy highly.

[DennisP]

Well crap that does seem to solve the problems I mentioned. I don't think that could be set up on Augur, but it could be implemented as a new contract.