Look for any emergency medical ID bracelets or necklaces
If the person is conscious, ask for the following:
Name
Symptoms
What happened leading to the injury
Allergies
Medications
Past medical concerns
Last time they ate food and drank water
Send someone to get first aid kit for bleeding or other surface injuries.
If there is bleeding, apply pressure to the wound
Never move the person unless the scene becomes unsafe
Send someone to get AED for cardiac arrest, not breathing or no pulse.
Only trained and certified personnel should provide first aid treatment such as CPR and AED. Whomever provides treatment should document their steps. Whomever has the highest level of training should take control of the scene.