Piper John McClements, previously known as Daryl Proctor, from the city’s Fountain area, pleaded guilty on the opening day of his trial at Derry Crown Court sitting in Belfast on Wednesday.
As a result, the 28-year-old was handed a life sentence and will later hear at a tariff hearing how long he will spend in jail before he is eligible for parole.
Mr McCauley died nine years after he was attacked at a barbecue in Derry in 2006.
Mr McCauley, a 29-year-old civil servant, was assaulted during a summer barbeque for a friend at Chapel Road in the Waterside on 16 July 2006.
In the early hours of the morning, a number of people attacked him and two of his friends.
The father-of-one suffered serious head injuries and never regained consciousness.
He died in a care facility in June 2015.
The trial of Matthew Gillen, who is also charged with the murder of Mr McCauley, is due to start on Thursday. Tags: