Mr Niles left the house, again wearing a Find Tia T-shirt, and said to reporters: "Just find my little girl, just find my little girl please."
Tia's uncle, David Sharp, later arrived at his mother's house but did not answer reporters' questions, saying: "Talk to the police for any information."
Police have launched a murder inquiry after a body was found at the home of Tia Sharp’s grandmother.
The worried family of Tia Sharp have renewed their pleas for her to return home as the search for the missing schoolgirl reaches one-week.
Police from the force that investigated the kidnapping of Shannon Matthews are now involved in the search for missing schoolgirl Tia Sharp