It's pretty difficult to get away with having your spouse killed. No matter what the police say to the surviving spouse's face, they're always a suspect. Sometimes they're the person they suspect first. And apparently law enforcement regularly plants ads to hire hitmen, and sit and wait for the calls to come in. Too many people get busted by undercovers posing as hitmen.
"The best kind of pride is that which compels a man to do his best when no one is watching."