How Long Does DNA Last on Different Surfaces?
Recent NIJ funded research reveals how long DNA is detectable on various surfaces under different conditions. This article is based on the grantee report, “Persistence of Touch DNA for Forensic Analysis,” by Meghan Ramsey. Since the first use of DNA evidence in a criminal case in 1986, forensic scientists have considered biological material (such as hair, skin and bodily fluids) to be relatively reliable physical evidence. While early technology required a substantial amount of biological material to extract enough DNA…