Add Yahoo as a preferred source to see more of our stories on Google. A sample taken from a bag hidden in a vehicle tests positive for marijuana with a colorimetric drug test. - Ken ...

Researchers have validated a colorimetric method that measures urea and ammonium simultaneously in a single KCl extract and ...

SAN FRANCISCO – State Senator Scott Wiener, D-San Francisco, introduced a bill on Tuesday that would prohibit law enforcement from making arrests or filing charges based only on certain field tests ...

COMMERCE CITY, Colo. (KDVR) — Colorado has become the first state to pass a law banning an arrest based solely on a colorimetric drug test, a common tool used by police to identify suspected narcotics ...

Colorado has become the first state to ban arrests based solely on a field drug test widely used by law enforcement across the county. According to a CNN story, colorimetric drug tests are common ...

COLORADO, USA — A new Colorado law restricts the use by police of a controversial field drug test that studies have shown can result in a high percentage of false positive cases. So-called ...

What are records? Since 2014, The Marshall Project has been curating some of the best criminal justice reporting from around the web. In these records you will find the most recent and the most ...