Officers said that they had no information suggesting that Carmelle had "come to serious harm", but that due to her age, vulnerabilities, and concerns around the people she may be with, specialist crime detectives are leading the investigation.
CCTV footage also shows her wearing a pink and white jacket going into a Primark on Croydon high street at 4.45pm on Sunday. She left at about 5.05pm. "Your family are desperately worried about you and while we're supporting them as best we can, they need to know that you're okay and to come home."They cannot rest until you're back with them."
In a message to the public, the DCI said: "If you have seen Carmelle, or you know her and have information about where she is or has been, it is imperative that you contact us.