The last person to have seen the young girl alive was her grandmother's partner, Stuart Hazell, who was apprehended after the police launched a manhunt to find him.
Police are sure to face criticism for taking so long to find the body that was right under their nose.
Even before he was apprehended - Hazell was the prime suspect.
During an interview here's what he said:
"Did I do anything to Tia? No, I didn't. I love her to bits. She is like my own daughter. I know deep down she walked out of here. I know deep down she walked down that path. What happened after that I don't know."
Unfortunately, Tia never did walk out of there.
Here's the statement from the police:
"A murder inquiry has been launched after a body was found at 20 The Lindens, New Addington."
Our hearts go out to all of Tia's friends and family during this impossibly sad time.