@AlexaBliz_ You lack nuance as you never specified if the killer is a "person" as a wolf is also a killer! You never specified if you discounted dead humans as "people" these are just two details you failed to specify thus leaving multiple forks as answers!!! Specificity is key in S.T.E.M.!
@Gini_220 some holes pass through TWO walls of material separated opposites by space yet usually joined transversely seamlessly by the same material & also there is a hole at the top! Now have a look here at a glimpse of human potential: https://t.co/s0MhqdpSnH