Jeffrey Epstein's name was uttered just once in the federal courtroom but his memory hovered like a cloud over Wednesday's hearing for an ex-cop who shared a cell with him on the day last July when the accused sex trafficker allegedly tried to kill himself. Nicholas Tartaglione faces a possible death penalty if convicted of the gangland-style killing of four men in a soured drug deal. He has become entangled in the Epstein saga - because many found it curious that the most high-profile inmate in the nation would be kept in the same jail cell as an alleged quadruple killer. As Epstein's cellmate at the time of the July incident ... Tartaglione [is] requesting the surveillance video from outside the jail cell, to prove that he helped save Epstein during the financier's abortive suicide try. Defense lawyer Bruce Barket said video of the incident would back up Tartaglione's story that he alerted guards to Epstein's plight. That fact could be used before a judge and jury. The problem is that the Bureau of Prisons says it no longer has the video. It was accidentally destroyed. The fact that the video is gone, which was reported earlier this month to great consternation, was yet another embarrassment for the Bureau of Prisons. Epstein died weeks later, on Aug. 10, in what was classified as a suicide by hanging, although some, including Epstein's brother, have suggested it could have been murder. By the time of his death, Epstein had no cellmate and was inexplicably no longer on suicide watch despite the earlier incident.