The Tiyanak (also Tianak or Tianac) is a vampiric creature in Philippine mythology that takes on the form of a toddler or baby. Although there are various types, it typically takes the form of a newborn baby and cries in the jungle to attract unwary travelers.

In Navajo culture, a skin-walker (Navajo: yee naaldlooshii) is a type of harmful witch who has the ability to turn into, possess, or disguise themselves as an animal. The term is never used for healers

A vampire is a creature from folklore that subsists by feeding on the vital essence (generally in the form of blood) of the living. In European folklore, vampires are undead creatures that often visited loved ones and caused mischief or deaths in the neighbourhoods they inhabited while they were alive. They wore shrouds and were often described as bloated and of ruddy or dark countenance, markedly different from today's gaunt, pale vampire which dates from the early 19th century.

The Glico Morinaga case (グリコ・森永事件, Guriko, Morinaga jiken), also known by its official designation Metropolitan Designated Case 114 (警察庁広域重要指定第114号事件, Keisatsuchō kōiki jūyō shitei dai-hyakujūyongō jiken), was a famous extortion case from 1984 to 1985 in Japan, primarily directed at the Japanese industrial confectioneries Ezaki Glico and Morinaga, and currently remains unsolved. The entire case spanned 17 months from the initial kidnapping of the president of Glico to the last known communication from the prime suspect,[1] a person or group known only as "The Monster with 21 Faces".

The Villisca axe murders occurred between the evening of June 9, 1912, and the early morning of June 10, 1912, in the town of Villisca, Iowa, United States. The six members of the Moore family and two house guests were found bludgeoned in the Moore residence. All eight victims, including six children, had severe head wounds from an axe. A lengthy investigation yielded several suspects, one of whom was tried twice. The first trial ended in a hung jury and the second ended in an acquittal. The crime remains unsolved.

The Oklahoma Girl Scout murders is an unsolved murder case that occurred on the morning of June 13, 1977, at Camp Scott in Mayes County, Oklahoma. The victims were three Girl Scouts, between the ages of 8 and 10, who were raped and murdered. Their bodies had been left on a trail leading to the showers, about 150 yards (140 meters) from their tent at summer camp. The case was classified as solved when Gene Leroy Hart, a local jail escapee with a history of violence, was arrested. However, he was acquitted when he stood trial for the crime.

The Zodiac Killer, or simply Zodiac or the Zodiac, is the pseudonym of an unidentified serial killer who operated in Northern California in the late 1960s.The killer originated the name himself in a series of taunting letters and cards that he mailed to regional newspapers, threatening killing sprees and bombings if they were not printed. Some of these letters included cryptograms, or ciphers, in which the killer claimed that he was collecting his victims as slaves for the afterlife.

The untimely and mysterious death of Princess Diana.

The "Boy in the Box" is the name given to an unidentified murder victim, a 4-to 6-year-old boy, whose naked, battered body was found in a bassinet box in the Fox Chase section of Philadelphia, Pennsylvania, on February 25, 1957. He is also commonly called "America's Unknown Child." His identity has never been discovered, and the case remains open.

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