A CORONER yesterday rejected a jury's recommendations on police practice because they did not arise out of court evidence. The three-member jury made four suggestions after they returned an open verdict on a man who was found hanging in a police cell. They said police officers should receive first aid training, be aware of emergency procedures and carry cell keys while on patrol. They also recommended a review of the number of officers on night duty. Coroner John Saunders said he could not accept the recommendations but would notify the police of them. The inquest heard Liu Yuet-yin, 43, was arrested on drug charges and held in a cell at Sha Tin police station on July 30 last year. At about 6.30 am the station sergeant, Yu Tai-wai, saw Liu sitting on his bed. Returning five minutes later, Sergeant Yu found Liu hanging by his neck but had to fetch the key before he could try to resuscitate him. Liu was admitted to the Prince of Wales Hospital but died an hour later.