 Lorraine asserts that David levitated, ceased breathing for a time, and even demonstrated the supernatural ability of precognition, specifically in relation to the murder Johnson would later commit.In October 1980, the Warrens contacted Brookfield police to warn them that the situation was becoming dangerous.According to eyewitness testimony, Arne Johnson coerced one of the demons purportedly within David to possess him while participating in David's exorcisms.