annie mccormick is joining us live at the school in winfield heights. >> reporter: at this hour. philadelphia police are calling this a death investigation. they are not ruling this a homicide. there are several reasons why. they are trying to figure out if there are preexisting with this young student or just a tragic accident. philadelphia police and emergency crews responded to wordsworth academy after they launched an investigation after a 17-year-old resident died after an altercation with staff. the staff confronted the teen about a stolen ipad. after discovering the device in his room the teen became upset. they tried to subdue him and placed him in a head lock. they are waiting to see if the teen had preexisting conditions. according to the website, they are a nonprofit organization, trying to help children overcome behavioral and academic challenges. the school is releasing few details. >> they don't know who it is. >> faculty is not telling the students anything. >> no. >> although we are shocked and sadden by this event sts an on going investigation and unable to comme