I remember watching this last year..

Honestly, the first thing that came to mind was that they were some type of experiment, or strange lifeform that had escaped captivity or something, and the "cops" were actually sent to retrieve them... Not that they were actually cops.

I don't understand why they say "Theyre gonna steal your organs" and constantly state that they want the police.. it's as if they had prior engagements with the officers, recognized them, saw danger, and tried to get the fuck away from them all at any cost, including taking their own lives.