The 57-year-old fell off a bench he was sitting on in Motherwell Police Station, striking his head on the bench and floor, causing an injury above his left eye.
Following the incident in the early evening of 1 November 2019, the local police inspector took immediate action and both officers have since been given guidance on dealing with such situations.
The inspector has also issued general guidance to staff in his command area about the importance of prisoner care.
The man was earlier arrested for being drunk and incapable. After being assessed at hospital, he was passed fit to be detained in custody.
The investigation report, for the Police Investigations & Review Commissioner (PIRC), found that the two officers should have paid greater attention to the welfare of the man, since he was obviously intoxicated.
It added that had the officers not been distracted by using their personal mobiles, they may have prevented the man’s injury.
The man was taken back to hospital where he was treated for his injury, then returned to the police office. He was later released from custody and issued with a Recorded Police Warning.
The incident was referred by Police Scotland to the PIRC on 2 November 2019. As Police Scotland has already dealt with this matter, no recommendations are made.
You can read the report and its findings HERE.