Good stuff here.
I started as an EMT out of highschool then became a medic, Long story short I became a LEO and over the years merged the two together. Being fit is good being fit of mind is imperative, Seeing someone shot be it the suspect or a fellow team member or an innocent person even possibly a child CAN NOT INTERFERE WITH YOUR JOB PERIOD. You must be able to treat a man who has just slaughtered people. Your a medic not a jury.