It may be asserted that there is no more effective deterrent to crime than the certainty of detection. Equally true is that there is no surer way to establishing identity than by fingerprints. The detection of fingerprints at the scene of crime is therefore one of the most powerful tools available in casework investigations. However, if the crime evidence is deliberately or accidentally exposed to water, the fingerprints get washed out and cannot be detected by conventional techniques. In this communication, we describe a simple experiment that enables the visualization of fingerprints on moist items.