The 22 year old went missing last Thursday, July 13 and has not been seen since.
Detective Inspector Chris Millar said: “Dean was last seen in the Carnmoney Road area of Newtownabbey shortly before 1pm on Thursday of last week, 13 July.
“Dean is described as being 5’8” in height; of medium build with blue eyes, dark hair and a beard. He also has sleeve tattoos on both arms.
“It has now been established that Dean was wearing a short sleeve maroon shirt, denim knee length shorts and dark coloured canvas shoes.
He was wearing a gold watch on his right wrist.
“Police continue to conduct searches in the local area and we would appeal to Dean, or anyone who has seen him or knows his whereabouts, to make contact with police by calling 101, quoting reference number 121 of 14/7/17.”
The images released of Dean were taken from CCTV footage earlier on Thursday, July 13.