Arne Cheyenne Johnson stabs and murders his landlord, claiming to be under demonic possession while Ed and Lorraine Warren investigate the case and try to prove his innocence.Arne Cheyenne Johnson stabs and murders his landlord, claiming to be under demonic possession while Ed and Lorraine Warren investigate the case and try to prove his innocence.Arne Cheyenne Johnson stabs and murders his landlord, claiming to be under demonic possession while Ed and Lorraine Warren investigate the case and try to prove his innocence.