Corpse of 16 year old girl discovered after she went to see someone she met online

The body of a 16 year old girl, Leonne Weeks from South Yorkshire was found few hours after she was declared missing. According to her friends, the teenager had gone to see someone she meet online. When she didn't return, her parents launched a facebook appeal and few hours later, her body was found in an alleyway in Rotherham, South Yorkshire.  The police has launched a murder