He has latent psychic abilities that are triggered by his near death experience and contact with Antubis who keeps him alive long enough for the ambulance to arrive. Due to his head trauma and the strain of his devolping psychic abilities his body enters a coma to help him recover. Despite this his mind is still aware of its surroundings making him aware of daily activity but unable to respond or react to anyone.
His developing powers soon make him aware of the supernatural going ons in the hospital has he is watched over by Antubis early in the series who claims he is important to him and Mary. He is soon contacted by Mary who tells him she is afraid; only to be snached up by Paul who threatens Peter with worse things than death. Since Peter is still weak he loses the conection and returns to a coma state.
Later has his powers develop he starts wandering the old hospital still under the guidance of Antubis who warns him of the limitations of his weakened state.
When Paul; made worried by the danger Peter poses starts manipulating a dangerous criminal to kill Peter, the painter is unkowingly rescued by Antubis who is badly ingured fighting Paul off. With his strength growing, Peter enters the Old Hospital after hearing Mary's telepathic cries of distress were they come upon Antibus's injured body. Mary explains to the best of her understanding that Antibus is important in keeping the tormented souls in the hospital under some level of control and without him both humans and ghosts are in serious trouble.