Sources;
https://www.en-vols.com/en/inspirations-en/new-jersey-serial-killers-true-crime/
https://en.wikipedia.org/wiki/Joseph_Kallinger
https://www.hrw.org/reports/2001/ustat/ustat0301-01.htm#:~:text=The%20vast%20majority%20of%20people,properly%20administered%20and%20scored%20I.Q.
https://archives.law.virginia.edu/dengrove/writeup/trial-serial-killer-joseph-kallinger#:~:text=Kallinger%20murdered%20one%20son%2C%20Joseph,and%20murder%20across%20three%20states.
https://murderpedia.org/male.K/k/kallinger-joseph.htm#google_vignette
https://serialkillercalendar.com/JOSEPH-KALLINGER-AKA-THE-SHOEMAKER.php
https://archives.law.virginia.edu/dengrove/writeup/trial-serial-killer-joseph-kallinger
view more