Check the listing for details. Gold Standard DRE Challenge Coin. Listed at 15.95 USD. The gold standard in law enforcement are DREs. This is a highly detailed DRE challenge coin, and is truly one of a kind! DRE (Drug Recognition Expert) challenge coin. Its like SWAT, either you DRE or you don't. It's hard work to become a DRE and harder work to continue to maintain your level of expertise. Show off your awesomeness and certified level expert with this amazing patch. A truly one of a kind patch. A Drug Recognition Expert (DRE) is a law enforcement officer trained to identify people whose driving is impaired by drugs other than, or in addition to, alcohol . All DREs follow the same 12 step procedure called a Drug Influence Evaluation, to determine which category of drugs is causing the driver to be impaired. DREs often testify in court, where the term "expert" has important legal implications. The acronym 'DRE' has been used to refer not just to the DRE officers, but also to the examination they perform, the "Drug Recognition Examination", or "Drug Recognition Evaluation."