Lindsay Lohan Caught In Cocaine Lie By Urine Test

If there was any doubt, Lindsay Lohan was high on cocaine when she took that wild ride down the Pacific Coast Highway in 2007--the DUI arrest that has resulted in her current probation with a SCRAM bracelet and drug testing.

Lindsay's urine tested positive for cocaine, according to documents newly obtained by TMZ, even though she swore in a statement to the court, "I don't do drugs."

"I am sober. Promises in Malibu, CA, I left 2 wks ago or so & completed my stay & am & will continue to be drug free," she wrote.

Cops found half a gram of cocaine in Lindsay's pants pocket when they arrested her, but they spilled it all over the floor of the jail, TMZ reports. She was booked but never charged for possession of cocaine.

Lindsay had an explanation for the coke, but her urine told a different story.

"I am wearing a pair of borrowed jeans from a friend/assistant ... She wore a pair of my jeans ..." she wrote in her statement.

In other news, Lindsay has taken two drug tests as part of her probation and passed both, Radaronline.com reports.

"She is clear of illegal substances," a source told Radar.