David and Catherine Birnie

David Birnie's beginnings were so disturbing, it shouldn't come as a surprise that he went on to be a killer. But with Catherine, the line isn't so defined.   **Want to Support?**  Patreon: https://www.patreon.com/serial_killing  Anchor: https://anchor.fm/serial-killing   Website: https://serialkilling.squarespace.com/  Instagram: https://instagram.com/serial_killing/  Merch: https://teespring.com/stores/serial-killing   Moorland by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3928-moorland License: http://creativecommons.org/licenses/by/4.0/