Published Friday, 11 October 2013
Murder victim Kevin Kearney. (© Pacemaker)
The 39-year-old was detained by Serious Crime Branch officers on Friday afternoon.
Mr Kearney, 46, was found shot dead in a lake in a north Belfast park.
The father of two had been missing since Tuesday and his body was pulled from the water at about 3.30pm on Wednesday.
A dissident republican group is suspected to have been involved in the murder, which police have described as "callous and cold-blooded".
The man was arrested in west Belfast and is being questioned at Antrim Serious Crime Suite.
© UTV News