First, we no know that the victim of the alleged credit card fraud is a former cop with the Ankenny Police Department. He know teaches at a state law enforcement academy. That could explain why the police decided to respond so aggressively.
Second, Justin Ross, who was (legally) carrying a gun at the time of the raid, and who has been the occupant of the house most vocal in the media, has now been arrested on drug charges. It seems odd that he wouldn’t have been arrested at the scene. But perhaps one of the two people arrested have since implicated him. It will be interesting to see if those charges hold up.