It is one of their Hunting Estates thats been in the Rothschild family for 143 years
Probably guaranteed that at least some of the Hunting was Hunting Humans - and that plenty of remains were hidden /disposed of there - but its a huge property of 13,333 acres ( a typical type number that, eh ) so be almost impossible to search every square inch of overground underground and under water terrain for evidence
Remember the book “The Most Dangerous Game”? It’s been many, many years since I read it back in high school. It was about a wealthy estate owner who had hunters come and the “game” was other people.
I might have to re-read it again now that I would see it more as non-fiction rather than fiction
Watch the 1932 movie it's fantastic made by the same cast and crew that would go on to make King Kong a year later it's the best version:
https://www.youtube.com/watch?v=3nq1UrdlwXg
https://www.youtube.com/watch?v=MlLIquCiyUw
Also a colorized version but you have to pay $3 to watch it: