The suspect was seen drinking an orange juice and lemonade in the Generous Britain pub in Costock shortly after Colette is thought to have been murdered.
The case was never closed and featured in the 20th anniversary programme of Crimewatch in 2004.
Det Supt Kevin Flint said the public's help was vital in solving the case
Since the DNA profile was recovered last year, police have used it to eliminate 800 suspects.
Det Supt Kevin Flint, who is now leading the investigation, said: "We continue to look at forensic opportunities and we have now got a DNA profile.
"That is a massive leap forward.
"We have been able to eliminate many people who were of interest over the years but I now need the public's help.
"People will have suspicions but we have not had the right name.
"My experience is that many people will not give information unless the police knock on the door.
"I want the public to see this publicity as the police knocking on their door.
"We can eliminate people via a simple process of providing their DNA on a swab."
Mr Flint added that "the whole of Keyworth was hit by this tragedy".
"I want to ask the public to listen to the account of Colette's family.
"For this to happen is a parent's worst fear.
"For your daughter to leave home to walk a short distance and never return and be found murdered in a field, you can never imagine the impact that has had on Colette's family and friends."
COLETTE ARAM MURDER: SIGHTINGS OF VICTIM AND SUSPECT'S CAR
1. 1645 GMT Red Fiesta enters Keyworth 2. 1820 GMT Red Fiesta follows a girl walking alone 3. 1925 GMT Red Fiesta driver seen drinking milk 4. 1930 GMT Driver asks girl directions. She sees same man and car nearby soon after
5. 2000 GMT Driver parks Fiesta, walks off and returns. Seems to be carrying blade 6. 2010 GMT Screams and speeding car heard in Nicker Hill 7. 2150 GMT Red Fiesta drives from Bury lane to Selby Lane 8. 2240 GMT Red Fiesta parked where found by police next day
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