Is this information realistic or am I most probably missing something?

Private security companies can work almost entirely without fear of legal action. Governments often contract private security firms to undertake menial work such as guarding military sites. Should anything illegal happen, the government can pass the blame onto the security company, who are privately held and thus cannot be prosecuted by the government. The whole thing goes through the civil courts, and the security companies have become wealthy over the years and can afford the best counsel, overwhelming the prosecution.