Robert (doll) - Wikipedia ( en.wikipedia.org )
Sawney Bean - a 16th century Scottish legendary figure, said to be have been the head of a 45-member (incestuous) clan that murdered and cannibalised over 1,000 people in 25 years ( en.wikipedia.org )
Also, they lived in a cave.
Bluebelle - 60-foot twin-masted sailing ketch based out of Fort Lauderdale that scuttled following an act of mass murder by the ship's captain in 1961 ( en.wikipedia.org )
Arecibo message - Interstellar radio message carrying basic information about humanity and Earth that was sent to the globular cluster Messier 13 in 1974 ( en.wikipedia.org )
Murchison Murders: An author's "perfect murder" scenario gives a local real life murderer an idea ( en.wikipedia.org )
Arthur Upfield was writing a novel in which a killer comes up with the perfect murder scenario. In short, the killer puts the corpse of his victim inside a dead cow's gut, and burns both of them at the same time. He removes any metal fragments, such as jewellery, belt buckles and teeth, dissolving them in acid, then smashes up...
Jumping Frenchmen of Maine - Wikipedia ( en.wikipedia.org )
Self-immolation of Aaron Bushnell ( en.wikipedia.org )
Morgellons ( en.m.wikipedia.org )
Psychological condition in which individuals have sores that they believe contain fibrous material.
TWA Flight 800 - Third-deadliest aviation accident in U.S. history initially suspected to be a terrorist attack ( en.wikipedia.org )
Gong farmer: The people whose job it was to remove human effluent from privies and cesspits in Tudor England. Operating at night to avoid the public, they were generally shunned. ( en.wikipedia.org )
One notable incident occurred in 1326, when a gong-farmer named Richard the Raker fell into a cesspit whose ceiling had rotted, and drowned while collecting feces....
Great Sheep Panic of 1888. The day tens of thousands sheep across Oxfordshire broke from their enclosures and scattered in terror. Nobody knows what scared them. ( en.m.wikipedia.org )
Sednaya Prison - Nicknamed the "Human Slaughterhouse" is a military prison near Damascus in Syria operated by the Syrian government ( en.wikipedia.org )
Ashley Treatment - Controversial set of medical procedures performed on an American child "Ashley X" who had severe developmental disabilities from static encephalopathy ( en.wikipedia.org )
John Stonehouse - British Labour and Co-operative Party politician remembered for his unsuccessful attempt at faking his own death in 1974 ( en.wikipedia.org )
Ronald DeFeo Jr. (Amityville Murder) - (...) an American mass murderer (...) convicted for the 1974 killings of his father, mother, two brothers, and two sisters in Amityville, New York. ( en.wikipedia.org )
Scaphism - An ancient Persian method of execution ( en.wikipedia.org )
An alleged ancient Persian method of execution mentioned by Plutarch in his Life of Artaxerxes. It ostensibly entailed trapping the victim between two boats, feeding and covering them with milk and honey, and allowing them to fester and be devoured by insects and other vermin over time.
Equine chorionic gonadotropin - A hormone produced by pregnant horses used in the animal industry. ( en.wikipedia.org )
Blood farms in different parts of the world impregnate horses and draw their blood for the hormone to be injected in other animals. The production of the hormone is increased if the animal is stressed. Videos from the notes might be age or region restricted, here is a invidious link: Iceland - Land of the 5,000 Blood Mares...