In this article from Salon, it says:

While Trump was given preferential treatment in that he wasn’t made to wait the average 12 hours an arrest and booking would normally take — and he also wasn’t given any sort of cavity search or general wellness check — he did have a mug shot taken, which many people have been waiting a very long while to see.

In fact, all but one of his co-defendants also received preferential treatment. Yes, there are 2 systems of justice, one for the rich and powerful, another for the rest of us.