my brother in law was killed in an accident, now the toxoloigy report says he had meth in his report. My sister his widow is certain he was not taking part in the drug. He was on suboxone and has been for several years. They are very very close and have been through the prescription drugs before...What could be making this show up maybe a combination of other drugs he was taking. He had a prescription for the suboxone. Thank you for your help. This will be of great comfort for this to be cleared up