Cooling images shows the last moments of a missing woman who left a party 20 years ago and was never seen again.
The police believe that Lisa Dorrian was murdered after she had disappeared on 28 February in 2005, last alive in Ballyhalbert Caravan Park in Noord -Ierland.
Despite several large-scale search operations, the body of the 25-year-old has never been found.
On the 20th anniversary of her disappearance, detectives made a renewed attraction for information and released CCTV images of her last few hours.
The video shows that Lisa enters the Saltwater Brig Pub in County in the afternoon of 26 February.
She was last seen alive at a party in the Caravan Park on 27 February, where her handbags and possessions were discovered by officers looking for the area.
A murder probe was opened almost immediately after Lisa disappeared, believing the power that she was murdered that night or in the early hours of the following morning.
Lisa's deeply sad family joined the police with the public for information, and added: “Twenty years of secret can be ended with a single phone call.”
CCTV images show that Lisa entered in the afternoon of 26 February 2005, two days before she was missing in the afternoon of 26 February 2005.
On the 20th anniversary of her disappearance, detectives made a renewed attraction to information and released CCTV images of her last few hours
The police believe that Lisa Dorrian was murdered after she had disappeared on 28 February in 2005, last alive in Ballyhalbert Caravan Park in Noord -Ierland.
During a press conference on Thursday, Lisa's sister Joanne Dorrian that their mother had died “never to know what happened to her beautiful firstborn daughter.”
“Our family has never been the same since the day we got the news that Lisa was missing,” she added.
Crimestoppers have now offered a reward of £ 20,000 in the hope that the mystery can be resolved.
Detective head inspector Kerrie Foreman, of the most important investigation team of the police, said: “Lisa Dorrian was a young woman – only 25 years old – when she was killed.
'Lisa, who came from Bangor, was last seen alive in the night of Sunday, February 27, 2005 at a party in Ballyhalbert Caravan Park. It is believed that she was murdered that night or in the early hours of the following morning.
'Despite hundreds of extensive search operations and thousands of research lines, the body of Lisa has not been found and those who are responsible for her murder are not yet for accountability.
'Twenty years have now passed. That is 20 long years of unimaginable torment for a loving family. But despite their pain, they have never given up their search for answers and our determination has remained steadfast.
'We release CCTV images, together with stationary images. This is the last known images of Lisa in the run -up to her disappearance. My hope is to jog memories and encourage everyone with information to speak.
Lisa Dorrian was last seen alive at a party in Ballyhalbert Caravan Park on 27 February, where her handbags and possessions were discovered by officers looking for the area
Lisa Dorrian's Sisters Michelle (left) and Joanne, during an appeal to the 20th birthday of Lisa's disappearance
'Lisa was not just a name or an image on a photo or screen. She was a real person – a young woman with a family who loves and will miss her very much. They deserve to know what happened to her and they deserve justice.
“Those who have information, but who are reluctant or afraid of coming forward, must certainly have a troubled conscience.
'I ask you to take advantage of this opportunity to do and speak the right thing. Keep in mind that two decades have now passed. The circumstances of people may have changed and faithfulness may have changed.
