Barr; 'I personally reviewed that video footage. It shows conclusively that between the time Epstein was locked in his cell at 7:49 p.m. on the night of August 9 and the time he was discovered the next morning at 6:30 a.m., no one entered his tier,' he wrote in the book, One Damn Thing After Another.

https://www.dailymail.co.uk/news/article-10573985/Bill-Barr-says-surveillance-footage-proves-no-one-entered-Jeffrey-Epsteins-prison-cell.html

Vs Wikipedia

Two cameras in front of Epstein's cell also malfunctioned that night.

https://en.wikipedia.org/wiki/Jeffrey_Epstein#Death