Fingerprint

4 clues
F.B.I. clue
Crime scene clue
Crime-scene evidence
Its arch might be plain or tented
Similar answers:
Afinger
Allfingersandthumbs
Aufinger
Auricgoldfinger
Aurumfinger
Badfinger
Budderfingers
Butterfinger
Butterfingered
Butterfingers
Butterfingersmarsmounds
Chickenfinger
Chickenfingers
Colorprint
Colorprinters
Crossedfingers
Dontliftafinger
Dustedforprints
Dustforprints
Fatfinger