Guards at the New York City jail where millionaire investor Jeffrey Epstein was found dead Saturday did not conduct required checks on prisoners the previous night, according to a report.

Epstein died of a suspected suicide after being found unresponsive in his Manhattan Correctional Center cell where he was being held on sex trafficking charges. At approximately 6:30 a.m., Epstein was “found unresponsive in his cell in the Special Housing Unit from an apparent suicide,” the Federal Bureau of Prisons said in a news release.