36 year-old William Moorehouse was found injured in a playground in Ballywaltrim in Bray on Sunday evening and was pronounced dead a short time later.
A man in his 30s, arrested as part of the investigation has been released without charge.
Seven people have been arrested in connection with his death - all have now been released without charge.
World Champion Lara Gillespie Honoured with Wicklow County Council Reception
'The Dream is Becoming a Reality' - Tánaiste Turns the Sod on Long-Awaited St Catherine’s Special School in Kilcoole
Wicklow Author Eilish Fisher Shortlisted for Prestigious Carnegie Medal
Packed Woodenbridge Meeting Demands Action on Arklow–Shillelagh Greenway
Ronan Russell Wins Arklow Children’s Christmas Story Competition