Published Friday, 12 October 2012
Caroline Graham, who disappeared in Portadown in 1989. (© The Graham family)
The 19-year-old, who was originally from Newry, Co Down, had been living in a flat in Hanover Street with her boyfriend for around two years when she disappeared in April 1989.
On Monday, detectives began fresh searches at waste ground on Carleton Street in the Co Armagh town using new technology to investigate the area.
Probes are being put into the ground up to five metres deep to determine if there are any human remains. This is the first time the technology has been used in Northern Ireland.
That search has now been extended to include part of a house.
The property is currently being used as business premises. The police are working with the occupants in a bid to avoid disruption to their livelihood.
In 2000, one person was arrested in connection with Caroline's disappearance - but no charges have ever been brought.
The police believe some people in the Portadown area know what happened to the teenager.
Enquiries are continuing.
Anyone with any information about Caroline's disappearance is asked to contact detectives directly on 028 9070 0727.
© UTV News