Both are important.
You are mnistaken as it pertains to a loose gun. It is NEVER picked up by an officer.
Well, I think the same about your stance. Obviously the military police and civilian police teach a lot the same, but some different.
You are right on 99% of scenes involving a gun. DONT TOUCH IT. Most shootings are gang, drugs or family related, and are way over by the time cops get there, so yeah, on that you are right.
You are not right when it is an ongoing active shooter. If kids are dying, you DO NOT leave a man behind to guard a damn loose gun. You dont leave it for the guy to circle around and use. You pick it up, secure it, move to the threat.
Both are important, but not equally. If kids are dying, the crime scene doesnt mean shit. You are talking like a police command staffer who hasn't worked a patrol shift in decades.
Let me ask you this, then:
Say a shooting starts and two cops run in. There is a loose gun. Kids are dying. They see the loose gun. Kids are dying. Cop A tells Cop B to guard that gun, while Cop A runs to the threat. Cop A engages, but loses the gunfight and is killed. Suspect proceeds to keep killing kids while Cop B is babysitting a ******* loose gun.
You wanna be the one that explains that to the parents of kids who got killed after Cop A lost, and say "Ma'am, we had to preserve the crime scene, thats why Cop B didnt follow Cop A in".
You are just dead wrong on this, as it relates to active shooter incidents in civilian law enforcement. No disrespect, as I completely believe you if you say you were taught otherwise by the military police.
But that is NOT how domestic cops do it. And I just explained why. Kids matter first. Crime scene second.