If you've ever watched police footage or listened to a scanner you'll know that the justice system often deals with two equally shitty parties who are both trying to use the law to fuck over the other. It's also not uncommon for officers to tell all involved to stop being faggots and do nothing so long as something an officer either can't or doesn't want to ignore isn't involved ie. active warrants, physical violence, or easy convictions like drug possession. It's going to reach a point, if it hasn't already, where the DA(s) won't want to deal with this shit.
The court system does not have the resources to prosecute every crime and district attorneys are elected positions. They like quick and easy convictions, plea deals, especially in areas where their constituents want them to be tough on crime. Two gumby faggots spreading titty pics and internet history is not high up on this list of priorities. The felony drug charge is serious. Kids being around a the drugs is serious. Nick and Aaron's slapfight is not. I will not be surprised if it all amounts to nothing. Just because there is an investigation doesn't mean it will lead to sweet fuck all. I would assume rural Minnesota has more than enough domestic violence, crank dealers, and drunk drivers to deal with.