44-year-old Darren Augustine died following an incident at an address in Brentwick Gardens on the 26th of April.
The man police want to identify was with Darren, and they were both allegedly trying to carry out a burglary at the address.
10 people were arrested at the time, although have been released with no further action.
A 28-year-old man was arrested in May and has been bailed.
