I was talking to someone about this yesterday, I don't understand the need for people to interject themselves into arrests and things. I get if you're used to showing up on scenes and giving first aid that it may be your instinct to run over to people and assess them but she should also know the police there control the scene and the suspect and she can't walk up and demand access to him. Who's to say she isn't a friend of his trying to remove some evidence or some nut who hates cops and wants to fuck with what they're doing?