Carl Denke "The Forgotten Cannibal"
"Very few, if any, serial killers care for the objects of their depravity. However, Denke wasn’t a run-of-the-mill cannibal. He cooked his victims and then fed the small town what he called “pork.” It was actually human meat, but no one noticed. Allegedly, Denke sold the flesh of his victims for a profit.[10]This isn’t an unheard-of development as a more modern serial killer, Robert Pickton (aka “The Pig Farmer Killer”), served dead bodies to the local police before his capture, arrest, and subsequent confession. In addition, World War I was particularly brutal on Europe economically and people did what was necessary to survive."
https://listverse.com/2018/09/28/10-macabre-facts-about-karl-denke-aka-the-forgotten-cannibal/
"Early humans ate each other by CHOICE"
But new research suggests our early ancestors may have actually feasted on human flesh as part of a cultural or social ritual.
'Episodes of Palaeolithic cannibalism have frequently been defined as 'nutritional' in nature, but with little empirical evidence to assess their dietary significance,' said Dr James Cole from the University of Brighton.
https://www.dailymail.co.uk/sciencetech/article-4386588/Stone-Age-cannibals-Hunting-not-worth-hassle.html