The 70-year-old retired actor looked a bit worse for wear in the rare appearance outside his home on Monday.
Photos captured David in casual attire as he checked his car in his Sherman Oaks neighborhood.
The TV star rocked baggy gray sweats, a gray t-shirt, and black Crocs.
He looked nearly unrecognizable, with his signature red hair down to his shoulders, sunglasses, and a tan fedora.
David also appeared disheveled, as he was caught with his pants falling down, exposing his bare butt.
The New York native is best known for portraying hunky CSI Lieutenant Horatio “H” Caine in the hit series CSI: Miami.
He starred in the Emmy Award-winning procedural drama for its entire 10-season run from 2002 to 2012.
David also played the character in one-off episodes of CSI: NY and CSI: Crime Scene Investigation and lent his voice for the CSI: Miami video game.
The TV personality retired from acting after CSI: Miami ended and is seldom seen out in public.
He was spotted last April carrying paintings and other artwork into his art gallery in Westlake, California, again looking dramatically different from his on-screen role.
David, who traded his acting career to become an art dealer, was reportedly moving slowly and was being helped and driven around by a female assistant.
Before his longstanding gig on CSI: Miami, David played Detective John Kelly on the ABC series NYPD Blue.
He starred on the show from 1993 to 1994 and earned a Golden Globe award for his standout performance.
David appeared in a number of TV series and films since the late 1970s, including Proof of Life (2000), Session 9 (2001), and King of New York (1990).
As for his personal life, David has been married three times and has multiple children.
He married his first wife, Cheri Maugans, in 1979, though they divorced in 1984.
The An Officer and a Gentleman star went on to marry his second wife, Rachel Ticotin, in 1984.
They split in 1987 and have a daughter, Greta.
He tied the knot for a third time to Margaret Buckley in 1996, and their marriage lasted over a decade before they parted ways in 2007.
David also has two children, a son, Marquez, and a daughter, Paloma, with his ex-girlfriend Liza Marquez.
