GARY DOURDAN AND A CRACK HEAD ARE THE SAME...

...This only based on the fact that the CSI star was arrested for suspicion of possessing heroin, cocaine, ecstasy, AND prescription drugs in Palm Springs, California earlier this week.

Law enforcement sources tell TMZ the actor was asleep in his car at 5:21 AM when they approached the vehicle and made the bust.

Rumor has it is that he told police that the drugs weren't his and he was holding them for Britney Spears. Ha ha ha ... That's just what I hear.