Writer Bill Cardoso, who coined the term "gonzo" to describe the journalism of Hunter S Thompson, has died in California at the age of 68.
Hunter S Thompson shot himself at his home in February 2005
Cardoso was working for the Boston Globe newspaper when he befriended Thompson as they both covered Richard Nixon's 1968 US presidential campaign.
He later called Thompson's resulting story, which mixed outrageous reportage and personal excess, "pure gonzo".
Cardoso died of a cardiac arrest after suffering from throat cancer.
As well as being friends, Thompson and Cardoso were admirers of each other's work.
The word "gonzo" was said by Cardoso to be a slang word meaning weird or bizarre from his native Boston, Massachusetts.
Cardoso invoked the "gonzo" style for his own work, which appeared in US magazines Rolling Stone and Esquire.
He used the style when he covered the "Rumble in the Jungle", the 1974 boxing match in Zaire between George Foreman and Muhammad Ali, for New Times magazine.
Most of his piece focused on happenings outside the ring, including an encounter with paratroopers and a man selling python skin.
In 1984, Cardoso published a collection of stories called The Maltese Sangweech and Other Heroes.
He published another book, Dr Kurland and Dr O'Connor: The Story of a Feud, in 1990.
Long-time companion Mary Miles Ryan said Cardoso died at his home in Kelseyville, California.