No, they were not directly involved and no, pimping minors was not proven in court. Money laundering and conspiracy to facilitate prostitution were the charges that stuck. In fact, prosecutors claiming they were involved in child sex trafficking caused a mistrial https://apnews.com/article/business-trials-3b1c9d3e59e90cd60764b3eb989fec80
The point is not about what they did or didn't do, it's that if you try to go outside the system you get hammered.