Officer Green Has Been Dispatched to a Hotel That Is

Officer Green has been dispatched to a hotel that is the scene of a shooting. He sees the following items with potential evidentiary value scattered about the scene:
•6 shell casings that are scattered around the room
•A dirty towel on the floor near the bullets Officer Green used a magnifying glass but has not been able to determine what is on the towel. He should:

A) package the towel as evidence.
B) take the towel to a location with better light and examine it more closely.
C) return the towel to hotel management if the towel belongs to the hotel.
D) tell the cleaning crew to discard the towel if no one claims it.