I had 5 Arab city cruisers pull up with 2 cops per car, 10 in total, back in the 90's when I was having a music jam for this very reason, noise complaint. I met them all walking up to the music hall, (shed to be exact) before they got to the front door. One of them told me about the complaint and I apologized and told them I would turn it down and they politely thanked me and left. The only reason I could see for that many showing up was that they thought there was going to be a confrontation and came prepared. Those 5 police cruisers jammed up the road in and out and I had to direct the police out of there lol!! Never thought I would ever have to direct traffic for the police!!
Their should be protocols for handling situations like this and I think there are. First he should have explained to them in a calm way the situation and what would occur if they did not cooperate. If they shut the door in his face anyways, he should have made a quick call downtown to obtain a search warrant, contacted the land lord or manager of the apartment, obtained the contact info on who was leasing/renting the apartment, most likely parents. Contacted the parents and explained the situation if at all possible, then contacted the utility companies, cut off electricity, water, gas and cable to the apartment then waited for them to come out which they most certainly would have done! Once outside promptly arrest and detain all that were in the apartment who did not come out peacefully then searched the apartment with warrant in hand covering their tails.
Chances are their lease agreement has a termination clause for illegal activity and those brats would have learned a valuable lesson in respect, or at least you would hope so. Instead he let his emotions get the best of him, leading to most likely losing his job and probably lawsuits. This hurts the city, the department, the university, the families and all involved when it could have been totally avoided by a cool headed thinking professional.
Ask yourself who you would think should have the better judgement here, college students or professionally trained police officers dedicated to serve and protect? As someone said earlier two wrongs do not make a right but the police look to be in trouble here.