One in 10 people have traces of cocaine or heroin on their fingerprints

Scientists have found that drugs are now so prevalent that 13 per cent of those taking part in a test were found to have traces of class A drugs on their fingerprints — despite never using them.

But there is no easy escape for users as researchers from the University of Surrey, who have previously developed a quick fingerprint test to identify users, have created a definitive way to prove the difference between those using cocaine and heroin, and those exposed to the drugs due to environmental factors.

In a study published by Clinical Chemistry, researchers from the University tested the fingerprints of 50 drug free volunteers and 15 drug users who testified to taking either cocaine or heroin in the previous 24 hours.

Full story at Science Daily