Yoo Young Chul - The Raincoat Killer

https://en.wikipedia.org/wiki/Yoo_Young-chul
http://www.absolutecrime.com/yoo-young-chul.html
https://www.webnovel.com/book/crime-reports_20015626206592105/case-1-the-raincoat-killer_53729061989578447
https://gravereviews.com/2020/05/17/yoo-young-chul-the-raincoat-killer/
https://murderpedia.org/male.Y/y/young-chul.htm
https://criminalminds.fandom.com/wiki/Yoo_Young-chul
https://www.wikiwand.com/en/Yoo_Young-chul
https://www.smh.com.au/world/s-korean-serial-killer-confesses-20040719-gdjdd8.html
https://www.donga.com/en/article/all/20040718/236152/1
https://manuelmoreno18.files.wordpress.com/2012/04/annotated-bibliography-yoo-young-chul.pdf