Preston Police have released CCTV footage of Michael Brooks from the morning he went missing on Sunday 14 January.
The video shows Michael leaving his flat on Lawson Street with a friend at about 1.05am wearing a black hoodie with camouflage print at the bottom, black skinny jeans and black trainers with white laces.
Michael’s friend, who was the last to see him on the night of his disappearance, describes how the pair make their way along Cross Street and through Winckley Square to Avenham Park and then into Miller Park. The friend then says he loses sight of Michael.
The last confirmed sighting of him is on CCTV on Glover’s Court at about 1.20am.
Read more: New pictures released in search for missing Michael Brookes
Police are especially keen to speak to two people who Michael’s friend says walked past him near the gazebo in the park at around the time Michael went missing at about 2am.
Officers, with the support of teams from the North West Police Underwater Search and Marine Unit, the Environment Agency, Coastguard, Lancashire Fire and Rescue and regional police helicopter units, have carried out a number of searches in the Riversway, Avenham and Fishergate Hill areas since Michael went missing.
Friends and family of Michael Brooks have been searching Avenham Park throughout the weekend.
Detective Inspector Graeme Simpson, of South CID, said: “We remain extremely concerned for Michael who has now been missing for more than a week.
“Officers, with the support of specialist teams from the region, have conducted searches across the area Michael was last seen and we remain hopeful of finding him.
“If you saw him, or know where he is, please contact us immediately. I particularly need to trace and speak to the two people described who may have walked past Michael and his friend at around the time he disappeared and I would urge them to come forward.
“Any information, no matter how small or seemingly insignificant, could prove crucial to our investigation. We are aware that there is a lot of speculation on social media and would urge people to share any information they have with the police.
“Furthermore, I would urge Michael, if he sees this appeal, to call us to let us know he is safe and well.”
Police are continuing to appeal for information following Michael’s disappearance and would urge anyone who can assist with their enquiries to come forward by calling 101.