Ripper-like serial killer only found out after his death

[K-453]

This happened in Germany and it seems it hasn't gotten abroad much yet, so you probably haven't heard of it. Research in the case is still ongoing.

http://www.bbc.com/news/world-europe-36335244

http://www.ibtimes.co.uk/manfred-seel-late-family-man-suspected-being-frankfurt-serial-killer-who-preyed-sex-workers-1561125

http://www.dw.com/en/german-police-reveal-shocking-information-on-serial-killer/a-19269118

https://www.thesun.co.uk/archives/news/1209383/meet-the-family-man-pensioner-who-was-actually-a-cannibal-sex-killer-who-ate-body-parts-of-at-least-six-victims/

http://www.thetimes.co.uk/article/quiet-pensioner-was-cannibal-sex-killer-g6pf2jsxv

German Wikipedia:

https://de.wikipedia.org/wiki/Manfred_Seel