I think you're getting episodes jumbled together.
There was one where a publisher was upset about one of his best-selling authors leaving him, making it clear to the publisher that he'd be taking the (potentially award-winning) novel he was working on with him, in direct violation of his contract.
The publisher did make an (apparently) drunken threat towards the author at a party, and headed across town to drink heavily at a bar and (after checking the time) deliberately backed his car into someone else's in a parking lot, acting obnoxious enough that they'd be sure to report the incident. Then later parked his car in a public park (not a car-park), and a couple of police officers had to drag him out of the car and throw him in a cell.
But he didn't do the killing himself. He got an ex-soldier (not quite right in the head) who wanted to publish a book on bomb making to do the killing. He gave the guy the gun he kept in the glove-box with instructions to be careful not to smudge the prints, along with the key to the office the author worked in, with precise instructions on when to do the killing, and then he scratched up the door around the lock with a screwdriver to make it look like someone had broken into his car and stolen the gun and key.
(He later killed the ex-soldier by poisoning his drink and making it look like he'd been killed by his own incendiary devices. He also made it look like the author had stolen the plot for his book, which was about the Vietnam war, from the ex-soldier.)