I misread. I thought I saw Mar. I stand corrected.
Lilo Brancato, Jr., of The Sopranos, is facing a murder charge of killing a police officer.
Spade Cooley beat his wife to death.
Phil Spector hasn’t been convicted (yet).
He didn’t kill anyone. His partner pulled the trigger. He is held equally responsible for the act by law since he was equally involved in the original criminal act (burglary, as he should be). As a matter of law he would be considered a murderer if convicted but it doesn’t meet the criteria of the OP IMHO.
Former NFL player, Rae Carruth killed his pregnant girlfriend in 1999.
The OP didn’t restrict the subject to murder.
It said,
Matthew Broderick falls within the OP’s guidelines.
EDIT - I’m sorry, Loach. I didn’t read post #18 and #19. My apologies, as it was already pointed out.
ACCK!!! I meant #15 and #19.
William Burroughs shot his wife in the head in a drunken game of “William Tell.” I mean, there may not have been any criminal intent, but there was literally a smoking gun. A Mexican court tried him in absentia, and found him not guilty due to a lack of evidence, but he clearly did it.
The painter Caravaggio killed a man named Ranuccio Tomassoni, either in a duel or over a gambling debt (accounts differ). Even by the standards of 17th Century Rome, this was considered so sordid that he fled to Naples to avoid prosecution.
“Wild” Bill Hickok was, in his capacity as a lawman, involved in numerous shootings of varying degrees of legitimacy. Failing eyesight caused him to shoot his own deputy during a gunfight with an Abilene bar owner.
It’s actually “Wild Bill” Hickok. His real first name was James.
[/only on the dope]
Ted Kennedy?
Well, there was the famous case of Lana Turner’s daughter, who killed gangster Johnny Stompanato (some conspiracy theorists suggest Lana did it, but I know of no evidence to support that claim).
Among U.S. Presidents, Andrew Jackson killed at least one man in a duel. And Grover Cleveland performed several hangings during his tenure as sheriff of Buffalo, New York.
Mystery writer Anne Perry [aka Juliet Hulme] helped her friend Pauline Parker beat her mother to death. The film Heavenly Creatures is based on the murder.
The way I heard it, Deputy Mike Williams was rushing to Hickock’s aid after he heard the shooting between Hickock and Coe. It was dark and Hickock was a little quick on the draw, as it were. It was a reaction shot against someone he thought was one of Coe’s friends soming up behind him. Unfortunately, it was his own deputy. I’ve read one biography of Hickock, and some other books that describe the incident. I looked him up on Wiki before posting here and that is the only place I’ve read that says he was suffering from loss of vision as early as 1871, and the only place that suggests his poor vision was why he shot Williams. The books I’ve read say it was an unfortunate shot in the dark.
Of course, I stand to be corrected.
Some historians say that Ernest Augustus, Duke of Cumberland and King of Hanover, murdered his manservant. (He was also a rapist and one of his victims may have been his own sister, Princess Sophia.)
Lane Garrison (Tweener on Prison Break) was just charged with vehicular manslaughter after a drunken driving crash in December.
The 16th century composer Carlo Gesualdo caught his wife (who was also his cousin) in bed with her lover and murdered them both.
If relatives count (Marvin Gaye’s dad, Lana Turner’s daughter, etc.), Woody Harrelson’s father Charles Harrelson is not only a convicted hitman but a name that appears as the second (or whatever) gunman in a lot of JFK theories.
It’s a pretty open secret that Clay Aiken kills truckstop whores whenever he’s back in North Carolina, but then covers it up with benefit concerts for the sheriff’s departments. I don’t have a cite unfortunately, but it comes to me from someone who’s brother’s wife’s hairdresser had an affair with a truckdriver whose wife’s sister-in-law knows the brother of one of Clay’s roadies. (Or maybe I’m thinking of one of the New Kids.)
Of course there’s Chuck Barris. 
Author James Tiptree, Jr. shot Alice Sheldon and her husband. Though the evidence was obvious, Tiptree was never charged. 
Aaron Burr was certainly a celebrity when he killed Alexander Hamilton.
Boxer Emile Griffith killed Benny “Kid” Paret in a televised boxing match.
Pitcher Carl Mays killed shortstop Ray Chapman with a wild pitch.