Imaging of Latent Fingerprints through the Detection of Drugs and Metabolites

Dusting for prints : Antibody–magnetic‐particle conjugates comprise protein‐coated magnetic particles labeled with dye‐tagged fragments (see picture). These particles bind to drugs and drug metabolites such as methadone and benzoylecgonine that are deposited within a latent fingerprint. The conjugates provide a means to image the fingerprint and enable the identification of an individual whilst simultaneously providing evidence of drug usage.