Police have released new CCTV images of Owami Davies which are believed to be the latest ones of her.
The CCTV was taken at about 12.30pm on Thursday, July 7 and shows Owami in a dark jacket, a "distinctive" red Adidas t-shirt, light grey joggers, slider type shoes and carrying a white handbag over her shoulder.
She is walking north on London Road in Croydon away from West Croydon.
The 24-year-old had left her family home in Grays in Essex three days earlier on Monday, July 4.
Five people have been arrested during the course of the investigation for offences of suspected murder or kidnap.
All have since been released on bail, whilst the investigation team follow up on further enquiries.
Anyone with information should call the incident room on 020 8721 4622 - as police say "do not underestimate how important your call could be".
Detective Chief Inspector Nigel Penney, who is leading the investigation, said: “This latest CCTV shows Owami wearing a distinctive red top and heading towards the Norbury area.
"I would ask members of the public who were in this area, or nearby roads, to think back and call us if they remember seeing Owami and please do not underestimate how important your call could be.
“CCTV enquiries are very detailed to ensure nothing is missed.
"Every time a person reaches a junction it can mean that several new roads have to be examined to see which way Owami went.
"If a member of the public can give us a positive sighting in a particular road, even if they just saw her walking, that could save hours of delay and could be a huge help in finding what has happened to Owami.
“I want to thank all those members of the public, local businesses and partners who have already done so much to help and support this inquiry.
"Everyone I have spoken to is hoping that Owami is found safe and well and this nightmare for her family is brought to an end.
"Please, if you have information tell us and help us.”
South Area Commander Chief Superintendent Dave Stringer, said: “I can assure our community that all we can do to find Owami is being done.
"We are working closely with our colleagues in Specialist Crime, who are used to dealing with large, complex investigations and we are providing them all the assistance we can in this extensive inquiry.
"Everyone, I am sure, is hoping that Owami is safe and well and this nightmare for her friends and family will finally end.
"We understand the real anxiety that is currently felt in our community and we have additional officers patrolling to reassure you.
"Please do take the opportunity speak to these officers about your concerns, they are there to help you and answer any questions you may have.
"Lastly, I would like to express my thanks to everyone who has helped us, and is helping us, to find Owami.
"We truly appreciate the outstanding support we have received from both our community and our partners.”
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