Published Wednesday, 16 October 2013
A 44-year-old man was arrested on Wednesday. (© UTV)
Mr Kearney, 46, was found shot dead in a lake in a north Belfast park last week.
A 44-year-old man was detained in the Whiterock area of west Belfast on Wednesday morning.
He is being questioned by Serious Crime Branch officers in Antrim.
It comes after a 39-year-old man was arrested on Friday and a 45-year-old man on Monday. Both men were released unconditionally.
Father of four Mr Kearney had been missing since last Tuesday and his body was pulled from the water on Wednesday afternoon.
His funeral took place on Monday in the Holy Family Church on the Limestone Road before burial at Milltown Cemetery.
A dissident republican group is suspected to have been involved in the murder, which police described as "callous and cold-blooded".
© UTV News