Episode 1 & 2:
The Hinterkaifeck Murders:
The Gruber Family
The Hinterkaifeck Farm
Crime Scene:
the bodies of Yosef Gabriel and Maria Baumgartner found in one of the bedrooms
Crime Scene:
The bodies of Andreas Gruber, Cäzilia Gruber, Viktoria Gabriel, and Cäzilia Gabriel stacked on top of each other in the barn.
The Memorial on Hinterkaifeck farm
Sources:
https://allthatsinteresting.com/hinterkaifeck-murders
https://defrostingcoldcases.com/case-month-hinterkaifeck/
https://en.wikipedia.org/wiki/Hinterkaifeck_murders
https://excitingearth.wordpress.com/2013/03/26/the-mysterious-hinterkaifeck-murders/
https://www.ranker.com/list/hinterkaifeck-farm/cat-mcauliffe
HTTPS://DARKIDEAS.NET/TRUE-CRIME-ARTICLES/FROM-THE-DUSTY-ARCHIVES/THE-HINTERKAIFECK-MURDERS-HORROR-ON-A-BAVARIAN-FARM/
https://jackrosewood.com/hinterkaifeck-murders/
https://www.unsolvedcasebook.com/hinterkaifeck-murders/
REDDIT.com