Mr O'Reilly died after he was stabbed when he intervened in a fight at the Oliver Bond Flats last November
A teenager has appeared in court charged with the murder of Lorcan O'Reilly in Dublin last November.
The 15-year-old boy, who cannot be named because of his age, made no reply to the charge when it was put to him just after midnight.
His mother and grandmother were in court with him this morning and he has been remanded in custody for a week.
Lorcan O'Reilly (21) died after he was stabbed when he intervened in a fight at the Oliver Bond Flats complex in Dublin's inner-city during the early hours of November 1st.