NEW : Authorities apprehend suspect in murder , 27-year - old Daniel ##la Hubert . NEW : Police say that suspect was out on parole tied to domestic violence since May 23 . NEW : Mayor says injured 7-year - old girl ` ` is doing much better '' Prince ' ` ` PJ '' Avitto , 6 , was stabbed in the stabbing .
NEW : Authorities apprehend suspect in stabbing , 27-year-old Daniel St. Hubert . NEW : Police say St. Hubert was out on parole tied to domestic assault since May 23 . NEW : Mayor says injured 7-year-old girl `` is doing much better '' Prince Joshua `` PJ '' Avitto , 6 , was killed in the stabbing .