Answer:
Check his pulse with your hand while you put your ear near his mouth and look down at the sternum for chest rise
Step-by-step explanation:
When the officers get to the crime scene which involves a person or people being down it is important to ensure and check if they are still alive so they can be given urgent medical attention or proclaimed dead at the crime scene. The crime scene is then cordoned off to begin piecing up puzzles regarding the crime and gathering of evidences.
The checks to be done include checking the pulse with your hand while you put your ear near the mouth and look down at the sternum for chest rise.