More than 100 people have taken to the streets of Dublin today to demand an independent inquiry into the death of Terence Wheelock.
The 20-year-old was found lying unconscious in a cell at Store Street Garda Station after being arrested for attempting to steal a car in June 2005.
He died three months later in hospital from pneumonia.
Gardaí deny claims by his family that he was mistreated in police custody.
Terence's brother Larry Wheelock said there were "inconsistencies in the Garda's version of events".
"Through the family's own endeavours, we have uncovered some very damning evidence with regards to forensics, independent pathology and an engineer that examined Terence's cell.
"We've been at an inquest in the Coroner's Court, we don't believe that's sufficient enough to answer the many questions we need answered."