What is the name of the girl from Utah who did beauty pageants and was abducted and found in her basement?

She was a little blonde girl, approx. four years old, who did beauty pageants and was abducted and later found dead in her basement? There was a lot of media attention and the case was left unsolved for a really long time? Her parents were under suspicion but later the man who strangled her was found? It's a gruesome topic, but I need to know for my Health cl project and I can't remember her name!