trace; vestige; mark; sign; evidence
shoe print (of a suspect at a crime scene); footprint
operation scar; scar from an operation
rifling marks on a fired bullet
skid mark; tire mark; tyre mark
injection scar (e.g. injected drugs)
manual strangulation mark; throttling mark
linear mark; abrasion; scratch; streak
ligature mark; constriction mark; strangulation mark
ejector mark (on a cartridge)
extractor mark (on a cartridge)
feeding signs (of an animal, e.g. teeth marks in nuts, holes in leaves)
bullet hole; gunshot wound