West Midlands Police said today that they have been given authority by the Crown Prosecution Service to charge 22-year-old Phillip Simelane with the killing of Christina Edkins in Birmingham last week.
Mr Simelane, from Walsall, was sectioned under the Mental Health Act following the stabbing of the 16-year-old school girl last Thursday and will be charged with murder in due course, a police spokesman said.
Christina's parents Jason and Kathleen described her as a "bubbly, beautiful and intelligent" teenager.
They said: "We are heartbroken by the loss of our beautiful princess Christina and it's hard to find words to describe the pain we're all feeling.