A police jailer who was on duty when a prisoner hanged himself in a cell has told a jury he thought his colleague had carried out hourly inmate checks.
Pc David Stoll, 49, was at St Mary's Wharf police station in Derby when Craig Boyd, 32, hanged himself in 2004.
Mr Stoll told Nottingham Crown Court he thought a colleague had visited cells and so signed forms in his own name, giving the impression he had checked.
He denies the charge of misconduct in a public office.
CCTV video, shown to the jury, showed officers on duty at the time of Mr Boyd's death watching the Disney cartoon Finding Nemo.
Giving evidence, Mr Stoll admitted lying to his supervisor, Sgt Nigel Rogers, about who had carried out the checks as he wanted to impress him.
"I believed the visits had been done. I misled him as to who had done the visits," said Mr Stoll.
He signed his name in the custody records, showing he had checked the cells but told the court he had only done so to show checks had been done and not to show he had done them.
Two officers, Sgt Nigel Rogers, 42 and Sgt Christopher Linscott, 43, were acquitted on Monday.
The trial continues.