www.facebook.com/What-Had-Happened-A-True-Crime-Podcast-182561450126558
Twitter@whathadhappe5
IG/whathadhappenedtcpc
https://www.freep.com/in-depth/news/local/michigan/2019/11/08/michigan-murders-john-norman-collins-serial-killer-evidence/1475344001/
https://en.wikipedia.org/wiki/Michigan_Murders
The Michigan Murders by Edward Keyes
http://www.maryfleszar.com/My_Name_Is_Mary/Welcome.html
https://murderpedia.org/male.C/c/collins-john-norman.htm
