Richard Trenton Chase, who became known as the ‘Sacramento Vampire,’ began by killing animals and drinking their blood, eating birds alive and injecting himself with rabbit blood. His schizophrenia saw him in and out of mental institutions until 1976, but in January 1977 he went on a four-day murder spree, killing six people and drinking their blood. After the killings, he took various parts of their bodies with him to gnaw on later. On 26 December 1980 Chase was found dead in his prison cell; he had committed suicide by hoarding three weeks’ worth of medication and taking it all in one dose.

Tracey Wigginton (born 1965) is a murderer who achieved notoriety for killing a man in Brisbane, Queensland - Australia, in 1989 for biting off his genitals and drinking his blood to fulfil her need to ‘feed’ She has been notoriously known as One of Queensland’s most sadistic murderers under the name of the “vampire killer”. When tired, Wigginton claimed to be a vampire who needed to feed on human blood. For some time before the murder, she had been drinking the blood of her lesbian lover, Lisa Ptaschinski. On the night of the murder, Wigginton, Ptaschinski and two other women lured a 47-year old man, Edward Baldock, to a park on the banks of the Brisbane River, scrashing him to death. There, Wigginton stabbed him  multiple times and then drank his blood.  In 1991 she was sentenced to life imprisonment by the Supreme Court of Queensland. In spite of some savage demonstrations of violence and ferocity against other prisoners, she has been well noted and she has begun to study literature and is about to be graduate. Tracey Wigginton was released from prison on 11 January 2012.