Attorney General William Barr, shown here in July, says there were “serious irregularities” at the federal prison where Jeffrey Epstein was found dead Saturday morning.

Attorney General William Barr, shown here in July, says there were "serious irregularities" at the federal prison where Jeffrey Epstein was found dead Saturday morning.

Attorney General William Barr, shown here in July, says there were “serious irregularities” at the federal prison where Jeffrey Epstein was found dead Saturday morning.

Attorney General William Barr, shown here in July, says there were “serious irregularities” at the federal prison where Jeffrey Epstein was found dead Saturday morning.