A: FDLE defines touch DNA evidence as that which typically has no visible staining and would contain DNA resultant to brief contact with an item such that sweat and/or skin cells may transfer. This is not prolonged contact. The collection of touch DNA evidence is only recommended where a high degree of likelihood exists to provide probative results or investigative leads. The use of witness corroboration, visual monitoring systems, or sound deductive reasoning may aid in determining its value for DNA analysis.
Wearer and handler DNA evidence can be defined as that which may or may not demonstrate visible staining and would contain DNA as a result of prolonged contact and/or friction with an individual (i.e. collar of a shirt, sweat band of a hat, handle of a weapon). Elimination standards must be submitted where appropriate.
Drinker DNA evidence is resultant from a suspect drinking from something, such as straws or bottles, is not considered touch DNA due to expected saliva.