José William Aranguren

José William Aranguren (March 5, 1935 – March 17, 1964), also known as William Ángel Aranguren, was a Colombian criminal, bandit, sex offender and a serial killer. He is known for a wave of ambushes, kidnappings and murders committed during and after the 1950s, the date when he is believed to have started his criminal activities after ambushing a truck from a tobacco company with his fellow gang members.

He was directly responsible for the murders of 39 people in the village of La Italia, in Victoría. However, many newspapers and magazines of the time reported that he was responsible for more. His modus operandi consisted of ambushes on sidewalks, estates and highways, where he kidnapped and murdered law enforcement officials (such as soldiers and policemen), civilians, peasants and even minors. He also sexually assaulted female victims and committed thefts whenever he could.

At the time, he was known by the alias Desquite, because he exacted revenge for the murders of his father and brother, as well as suffering from the dispossession of his property. In the words of famous journalist Gonzalo Arango, Aranguren was "an assassin who killed simply to kill."