Wayne Treacy's sentencing date was set on Wednesday during a hearing.
He will be sentenced on Oct. 12 at 1 p.m.
Treacy, 17, was convicted of attempted murder in July for a 2010 attack on Josie Ratley. After the then-15-year-old girl sent Treacy text messages about his older brother who had recently committed suicide, he punched, kicked and stomped her head with steel-toed construction boots at a bus stop outside Deerfield Beach Middle School, according to prosecutors. Ratley suffered severe brain damage.
Attorneys made an insanity claim for Treacy, arguing that he suffered from post-traumatic stress disorder and was not in control of what he was doing at the time.
Treacy faces up to 50 years behind bars.