Harden Jamison tells tabloid National Enquirer the hotel heiress and Simple Life star was too drunk to notice she'd wet herself when he picked her and boyfriend Stavros Niarchos up after a party on Maui.
The disgusted cab driver claims he mopped up the mess with a towel and plans to use Hilton's own DNA as evidence against her.
Jamison has gone public with his story after getting threatened by Hilton's heavies, who hitched a ride in his cab, after making it known that he has a towel drenched with the socialite's urine.
He says, "They were all drunk and abusive. I kicked them out and flagged down a cop."
The cab driver claims one of Hilton's pals offered him $200 for the towel.
A spokesman for the socialite denies the incident.
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