The guys pathological, he's likely into actually doing the deed himself -for someone like him that's not something he's likely to farm out. He cut that old dude up and dumped in the bay, for really no good reason. Does that sound like something anyone over than a socia/psychopath would do?
As for rich people justice:
For those of you too young to remember, T. Cullen Davis (at that point, considered the richest man in Texas) killed his ex-wife's new boyfriend and his 12 yr old stepdaughter in his former mansion. He apparently had laid in wait for them and when discovered by the stepdaughter, shot her and then stayed around until ex-wife and new man came into the house. He shot and wounded the wife and shot and killed the boyfriend.
Davis even talked to the ex-wife after he shot her and then fled after some neighbors/friend who had heard the shots and came to the house to investigate. The wife told them immediately that it was Davis who did it and later testified in court as to his guilt. There was all kinds of evidence that it was Davis and yet his attorney (local Texas legend - Richard "Racehorse" Haynes) got him off completely.
In the middle of the trial, Davis threw a huge birthday party for himself and tons of law enforcement types, including the Sheriff, showed up to show their support for Davis.
In the mid 80's when the oil market went bust, so did Davis and he lost his fortune, then re-invented himself as an evangelist claiming to have found "God." The dude was a stone cold killer and had been involved in a couple of other things like a murder for hire plot as well, which the FBI had been able to stop before it came to fruition.
