There seems to be something fundamentally off with the philosophy of policing inculcated in police officers recently. It seems that when they are at a suspected crime scene, the overriding consideration in their mind is for their authority to be respected. I would think that making sure that people aren't dying should be their number one priority.
In this video, you will see 12-year-old Tamir Rice shot dead by police in Cleveland, OH. When his teenage sister tries to run to his side, the police, instead of tending to the boy they just shot, tackle and arrest his sister.