The State Pathologist is due to give evidence today at the inquest into the death of a 20-year-old Dublin man while in custody at Store Street Garda Station.
Terence Wheelock was found unconscious in a cell at the station last June after apparently hanging himself with the cord of his tracksuit bottoms.
The inquest into his death was adjourned last month after his family presented photographs which appeared to show cuts and marks on his body.
They say Mr Wheelock had no history of mental illness and claim he was mistreated while in custody.
The State Pathologist, Dr Marie Cassidy, is expected to give her views today on the family's photographs and on reports from the Mater Hospital relating to Mr Wheelock's admission.