It's not what the police do. The police keep the peace and questions of property ownership are figured out later. In this case, working backwards from the arre

It's not what the police do. The police keep the peace and questions of property ownership are figured out later. In this case, working backwards from the arrest (and discounting most of the presented information as coming from the source of the arrestee and unfiltered by a known yellow journalism rag), I can hypothesize that the officer was presented with a situation where one individual was clearly resident in the property, and the other individual had attempted to force entry, was arguing with the cops about owning the property inhabited by the other individual, and refused to leave. Easiest solution to that problem for the cop is to take the individual who was invading the property and give him some time in the cool-off tank overnight until everything can get resolved. On average that's the better solution. Imagine if the police were ripping you out of your home just because some lunatic showed up on your doorstep and started ranting that they owned your house. Playing the odds of perceived circumstance is likely to arrive at the best outcome here; the scenario where the angry invader is the legitimate property owner and the person resident in the building is the squatter is the rare scenario.