A fourth person has been arrested over the murder of Shane Whitla in Lurgan last Thursday, January 12.
The 28-year-old was arrested this evening (Wednesday) on suspicion of murder.
He has been taken to Antrim Serious Crime Suite for questioning following the search of a house in the Lurgan area.
A 41-year-old man arrested by detectives on suspicion of murder on Tuesday has been released on bail to allow for further enquiries.
Detectives are reiterating their appeal for anyone with information to contact them on 101.
Alternatively, information can be provided to Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.