In crime scene, as investigator you saw an alleged almost dried semen in the bedsheets at the crime scene. How will you collect the specimen?

an investigator will often use a black light to scan an area for traces of bodily fluids left at the crime scene. if there’s a substance that resembles semen or blood, they will often times apply a spray if it is dry and use a cotton swab to collect it in a vial to test back at the lab for dna evidence.

Explanation:

b

explanation:

a physical change is being made.