At least one camera in the hallway outside the cell where authorities say registered sex offender Jeffrey Epstein hanged himself earlier this month had footage that is unusable, although other, clearer footage was captured in the area. The incident is being investigated by the FBI and the Justice Department's inspector general's office, which are attempting to determine what happened and how to assess whether any policies were violated or crimes committed. The revelation of an unusable recording is yet another of the apparent failures inside the Metropolitan Correctional Center, the short-staffed Bureau of Prisons facility in downtown Manhattan that held Epstein. Meanwhile, there has been intense scrutiny of the federal facility where he was held, which did not follow its protocol in the handling of Epstein in several ways, officials have said. Epstein should have been checked on every 30 minutes. Investigators are exploring whether logs were falsified to indicate checks had occurred when they had not. Epstein also was supposed to have a roommate, following a July 23 incident in which he was found on the floor of his cell with marks on his neck. Authorities suspected he had attempted suicide; Epstein said he believed he had been attacked. He was placed on suicide watch for about a week after that. For a time, [he] had a new roommate. But that person was transferred ... and a new roommate was not assigned - despite the fact that at least eight jail officials knew Epstein was not to be left alone in cell.