Before anyone goes off and murders a hated family member just realize that most of those sorts of murders get solved. It's the drive-by, gangland sort of shit that goes unsolved.
If you murder your wife they will catch you.
edit: and it's pretty funny they call a 58% clearance rate "nearly half go unsolved" and laud a 60% clearance rate in another unidentified country. Fucking NYT. Yes our police are a problem but you don't have to make them look worse than they are.