On the other hand, strong evidence remained for the idea that there was a human component behind the haunting. It had been noted by the Duke researchers that an adolescent child, usually a girl, was almost always among the members of the household being plagued by poltergeist phenomena. They believed it was possible that this young person might be capable of psychokinesis during the height of puberty. In every case, though, the young person might be unaware that she or he was unconsciously causing the events to happen, making them as bewildered as the adults around them. In the case of the Herrmann house, Jimmy (according to Detective Tozzi’s notes) was at or near the scene of the poltergeist disturbances more than 75 percent of the time. For many incidents, he was the sole witness. However, the detective had cleared the boy of deliberately causing any of the disturbances.