Questioned sample

material collected as or from items of evidence which have a known location but an unknown originating source.
Discussion—Soil evidence of unknown origin, or questioned soil sample, typically consists of: debris adhering to an evidentiary object or exhibit (for example, tire, wheel well, garment, shoe, digging tool); foreign soil left at a crime scene (for example, transferred from a shoe/tire, or adhering to a re-buried body/object); or debris recovered from on or within a body (for example, nasal, stomach, or lung contents).