CHARLOTTE, N.C. -- Lawyers for NASCAR driver Jeremy Mayfield released results of his own independent drug test, showing no sign of methamphetamine.

Friday afternoon, Mayfield's lawyers revealed what they said is proof the driver does not use drugs.

• PDF: Mayfield's Independent Drug Test Results

Attorney John Buric said the results show no detection of meth or amphetamines. The results, one sheet of paper from LabCorp, do not have Mayfield's name only a number.

"This number is referred to in the sample data packet that will show that it is Mr. Mayfield's sample," Buric said.

That data will not be available until next week.

Buric said the results come from a test taken the same day, within the same hour, of a different test NASCAR's lab Aegis said paints the driver as a chronic meth user.

Buric laid out different scenarios to explain the discrepancy. "Which of the three scenarios you outlined do you think is the most plausible?" Eyewitness News asked.

"I think the last of them is the most plausible," Buric said, "which is that Aegis is intentionally doing this to Mr. Mayfield."

Buric said he believe this case will go to a jury, and may not be resolved until 2011.

In an email, NASCAR spokesman Ramsey Poston said: "They seem to be light on the details don't you think? It's all pretty transparent. We will continue to let real science and sworn affidavits do our talking."

---

NASCAR Doctor Says Drug Tests Accurate

Also on Friday, a doctor responded to Mayfield's case and said it’s just not possible that two tests on the same day could have different results.

Mayfield's tests were analyzed by a Tennessee lab called Aegis, which is run by Dr. David Black. Black is the administrator for NASCAR’s drug-testing program.

Earlier this week, NASCAR revealed Mayfield tested positive for methamphetamine for a second time.

Mayfield said on Thursday that he has multiple independent tests showing no sign of the drug, including some taken on the same day of the positive tests from NASCAR. Black told Eyewitness News that given the levels of the drug his lab found, that's not possible.

Black said when and if Mayfield's camp does submit the multiple negative test results they claim to have, there's no way NASCAR would accept it.

“There are no programs that allow someone who tested positive to choose the date, the time, the place and the circumstances of the test. It is absolutely irrelevant whatever tests he may have,” Black said.

Eyewitness News asked Mayfield when his negative test results would become public, and he said soon. His lawyer sent a document to Eyewitness News on Friday afternoon showing that a Charlotte lab tested a sample on July 6 and found it negative for methamphetamine.

Court documents filed Friday indicate a settlement is unlikely in this case, and that it may continune well into 2010.