Sergeant Alan Clayton said: “This simple piece of equipment will have a big impact on drug use in pubs and clubs.
"It looks like a normal LED torch but if it is pointed at the person’s nose and mouth area it shows up bright green if they have been taking the drug.
“It is even easy to see the minute cocaine crystals secreted within the nasal hair.”
“Small traces of cocaine are also left on the cheeks and chin that are not visible to the naked eye and these show up bright green too. It really is amazing.”
He added: “When people have been drinking it gives them dutch courage.
“When they have taken cocaine it can give them an almost super strength and the two in combination can lead to violent outbursts.
“This torch could reduce trouble in future and it could also cut down on people going into venues and selling drugs.”
– Lancashire Telegraph, March 31st, 2009.