According to Colombian police, Luis Alfredo Garavito is a glib predator and a “solitary sadist” who stands accused as one of the world’s worst serial killers. In 1999, Garavito, a 42-year-old drifter, confessed to the slayings of at least 140 boys between the ages of 8 and 16 during a 5-year killing spree. Garavito would befriend the children and take them on long walks until they were tired. Then he would tie them up with nylon rope, slit their throats or behead them, and then bury their bodies. Most of Garavito’s victims were street children, children from poor families, or children seperated from their parents by poverty or political violence. Authorities said it was beacause there was no one to notice that the children were missing or to inquire about their whereabouts that Garavito was able to go on killing for so long without being detected.