New mothers say they had to undergo devastating investigations after hospitals reported their false positive drug tests to child welfare agencies shortly after they gave birth. This report is ...

In the child welfare system, the threshold at which a drug test is considered positive varies widely from one jurisdiction to ...

Faulty drug tests given to thousands of California prisoners gave false results for opiates Prison advocates worry that the false positive results have tainted the parole decision for inmates.

Can levalbuterol (Xopenex) cause urine to test positive for amphetamines? —William L. Powell, Orland, Calif. Drug screens falsely positive for amphetamines have been associated with use of the Vicks ...

This article was published in partnership with The Marshall Project, a nonprofit news organization covering the U.S. criminal justice system, Reveal and Mother Jones. Susan Horton had been a ...

A view of the East Block at San Quentin. Thousands of drug tests given to California inmates gave false results last year. Prison advocates worry that parole decisions were tainted. (Robert Gauthier / ...