Answer:
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:
I believe the answer would be sugar
Answer:
the blood gets oxygen in the lungs its called oxy-rich blood (im pretty sure this is correct)
Explanation:
