NEW : Authorities apprehend suspect in murder , 27-year - old Daniel ##la Hubert . NEW : Police believe Daniel St. Hubert , 27 , was out on parole when he stabbed two young children inside an elevator -- killing one of them . 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 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 .