Given that the police is mostly a hassle and pretty useless otherwise, especially when you are part of the uberrich, I am not surprised. Why spend valuable time at the precinct trying to make a high-school-dropout in uniform understand what they are supposed to do if you can just hire private security?
When you are spinning up lawsuits (allegedly) to sue induviduals around an indident that occured (allegedly) - it makes your case, that these induviduals were party to a crime, much stronger if you have at least a police report, statements etc of the crime in question.