If Tito Ortiz is looking for a scapegoat for his alleged attack on girlfriend Jenna Jameson, he's going to have to look further than the drug abuse excuse. That's because the porn star passed a drug test that proved she was clean as a whistle. TMZ is reporting that a test conducted by American Toxicology Inc. reveals that the mother-of-two was negative for cocaine, marijuana, oxycodone and other drugs. After being arrested for domestic violence, Ortiz put on a tear-filled spectacle where he accused Jameson of being hooked on OxyContin. He assured the media that he was only trying to help his lover... and he helped right to the doctor's office for torn ligaments. Jameson tells TMZ, "I am definitely not addicted to OxyContin or any drug." Jameson's lawyer also spoke out about the drug abusing allegations being made against his client saying, "The lab tests clearly exonerate Jenna Jameson of any hint, iota, or suggestion that she ingested or was under the influence of any opiates or controlled substances. Statements made by anyone to the contrary are completely impeached by the results from this prestigious testing facility." Looks like Ortiz has some serious explaining to do.