Christian Brando, eldest son of the late actor Marlon Brando, has died in Los Angeles, aged 49.
Christian Brando had a few minor film roles
He had reportedly been in a coma and on a ventilator, and died of complications arising from pneumonia.
"His body was totally compromised," said his former wife, Deborah. "He'd lived so hard."
After a few minor acting roles, he hit the headlines in 1990, when he shot dead his half-sister's boyfriend, for which he served five years in jail.
In 2005, he pleaded guilty to abusing his then-wife Deborah and was placed on probation, and ordered to undergo drug and alcohol rehabilitation.
Christian Brando also figured in the murder trial of Hollywood actor Robert Blake, whose wife was shot to death in 2001.
He invoked his Fifth Amendment right against self-incrimination on the stand when a lawyer for Blake, who was eventually acquitted, suggested that Brando had been the killer.
Marlon Brando died in 2004
Christian Brando had a small number of film roles, including an appearance in I Love You, Alice B Toklas! at the age of 10.
But he will be best remembered for the 1990 death of Dag Drollet, boyfriend of his half-sister Cheyenne, at the Brando family's estate.
He said in court that he had accidentally shot Mr Drollet as they struggled for a gun during an argument over whether the boyfriend had beaten his pregnant girlfriend.
Pleading guilty to manslaughter, he spent five years in prison.
Cheyenne committed suicide in 1995 at the age of 25.
Marlon Brando, star of On The Waterfront and The Godfather, died in 2004 at the age of 80.