His girlfriend was making breakfast downstairs when he shot himself in the mouth with a handgun.
On December 28, 2006, he showed up in a hospital emergency room, claiming that he was going to jump off a building.
In late 2006, he was hospitalized for suicidal depression.
A week before his death, his girlfriend heard him talking to himself, saying "just squeeze the trigger."
The coroner said he had a history of schizophrenia and had taken several antidepressants and a sleep aid.
His girlfriend states that he had problems with "insomnia, paranoia, and high blood pressure due to stresses of his work schedule."
He was diagnosed with severe clinical depression, along with bouts of psychotic paranoia.
His website claims that he appeared on The Tonight Show more than any other stand-up comedian, with his earliest appearance dating back to when Johnny Carson was host.
At the time of his death, he was living in West Hollywood, CA.
He won a Clio Award for his work as a writer and performer in a campaign for the Milk Association.
In 2004, he was named number 57 on Comedy Central's list of the 100 greatest standups of all time.
Richard: Way I see it, we're all on the Hindenburg, no use fighting over the window seat.
Richard: I think that's how Chicago got started. A bunch of people in New York said, "Gee, I'm enjoying the crime and the poverty, but it just isn't cold enough, let's go west."
Richard: Honesty is the key to a relationship. If you can fake that, you're in.
Richard: (on going to war over religion) You're basically killing each other to see who's got the better imaginary friend.
Richard: Look over here on this chart, these are carbs, these are proteins, so stop eating, you fat bastard!
Richard: I always look for a woman who has a tattoo. I see a woman with a tattoo, and I'm thinking, OK, here's a gal who's capable of making a decision she'll regret in the future.
Richard: It is a sad fact that 50 percent of marriages in this country end in divorce. But hey, the other half end in death. You could be one of the lucky ones!
Richard: (on his college degree) Imagine my surprise when it turned out the main thing that I was qualified for was to get another degree and teach Political Science to other people, who would, in turn, teach it to other people! This wasn't higher education, this was Amway with a football team!
Richard: My mother never saw the irony of calling me a son of a bitch.