Media playback is unsupported on your device Media caption Malcolm McKeown murder: Police release CCTV footage

The PSNI has released CCTV showing the moments before Malcolm McKeown was murdered.

The 54-year-old was found dead in his silver BMW behind Dewart's service station in Waringstown, County Down, on Monday night.

A 30-year-old man and a 28-year-old man arrested by detectives have been released unconditionally.

The father-of-three's body was found at about 21:00 BST, 90 minutes after police believe the shooting took place.

Det Ch Insp Pete Montgomery said Mr McKeown had been shot up to six times at close range.

He said that Mr McKeown had gunshot wounds to his head and body.

Det Ch Insp Montgomery said two teenage boys had found Mr McKeown's body which he said was something "no child should ever have to witness".

He added that organised crime was a "strong line of enquiry".

Image caption Malcolm McKeown was found dead in his vehicle behind a petrol station

Describing it as "brutal and barbaric", Det Ch Insp Montgomery appealed for anyone with information to come forward.

On Wednesday, police said searches were ongoing in the Lurgan and Waringstown areas.

Officers believe the victim had gone into Dewart's shop at about 19:15 BST and was shot after he came out a few minutes later.

Mr McKeown had been due to appear in court on Monday on a charge of aggravated burglary.

Image copyright Pacemaker Image caption Police officers revisited the scene of the shooting on Tuesday

The charge against him was connected to an incident in Lisburn, County Antrim, last November in which a householder was allegedly tied up and robbed.

Mr McKeown was remanded on bail and was due to reappear in court in a month's time.

Police have appealed to the public for information about the movements of the victim's car and a second vehicle which was found burnt out after the attack.

Image copyright Pacemaker Image caption A cordon was put in place while forensic officers examined the murder scene on Tuesday

After the shooting, a blue Volkswagen Passat was found burnt out on Glenavon Road in Lurgan, County Armagh.

That vehicle, registration RK62 PLX, was also seen leaving the scene of the murder, police said.

The murder has been widely condemned by political representatives in the area.

Image copyright Pacemaker Image caption Forensic officers examine a Volkswagen Passat which was burnt out near Lurgan

Ulster Unionist MLA Doug Beattie said he knew the victim, who had attended his constituency office in the past.

"The police need to get on and do their job in respect of this horrible murder," he said.

"Yet again we see guns on our streets and that's not acceptable in any shape or form."

Image caption The shooting happened on Monday night at a service station in Waringstown

DUP MLA Carla Lockhart said it was "shocking" that the shooting had happened in "somewhere like Waringstown".

"It is a generally quiet village with a thriving population," she added.

Sinn Féin MLA John O'Dowd said "people are appalled by what has happened".

SDLP Upper Bann MLA Dolores Kelly said the community was in shock.

"This is a quiet, settled village and people are appalled that violence has been brought on to their streets."