Epstein is a pig and a child abuser but the plea deal that he took before one which gave him immunity and his plea deal may be his get out of jail card, free. The constitution does prohibit someone from being tried twice for the same offenses and many lawyers are saying that because the past agreement with the government sets up a double jeopardy situation thus the courts may set him free based upon that sweetheart agreement/plea/deal that he got before.
The only way that it would not be double Jeopardy is if there is evidence of offenses after that agreement then it would be new accusations and a new situation. Most would believe that he would go free because of the political contacts that he has and what he may have on important, powerful, people but his freedom may come because of the Constitutional protections that all citizens have. There is no question as to his guilt but let us just hope that some new victims will come forward.