DETROIT (WXYZ) — The Michigan State Police Forensic Science Division announced Friday it has temporarily stopped marijuana blood testing due to an issue discovered ...

The Michigan State Police has halted all laboratory blood testing of marijuana so that it can investigate problems in its testing methods that may have produced false positives for THC. The move comes ...

(WXYZ) — The Michigan State Police say more than three thousand cases involving alleged marijuana impairment could have been false positives. Last week, the MSP ...

(CBS DETROIT) - Some cases related to alleged marijuana impairment could have been false positives after Michigan State Police detected possible discrepancies in 3,250 laboratory reports. State police ...