FORT LAUDERDALE, Fla. (AP) — A teenager convicted of savagely kicking and stomping a 15-year-old girl in the head after the two got into an insulting and vulgar text message exchange was sentenced Monday to 20 years in prison despite evidence he suffers from severe mental illness.

Circuit Judge David Haimes imposed the sentence, rejecting Wayne Treacy’s request for a prison term of less than eight years because of the post-traumatic stress, depression and suicidal thoughts he has had after his older brother’s suicide. Treacy, 18, had faced a maximum of 50 years behind bars for the 2010 attack on Josie Lou Ratley, who has permanent brain injuries.