Pedro Lopez, a Columbian citizen who has travelled around Latin America because he's been caught and released by many authorities.
The monster of the Andes, as he's known in the region, has confessed to killing 100 girls in Colombia, 11 in Ecuador and more than 100 in Peru.
Being imprisoned as a car thief in Colombia in 1978, he would be the most improbable culprit if we judge based on what we see on TV.
The fact that he was harassed while in jail and had to save himself by murdering the four men who did it to him, unlocked his true identity.
The final judgment he received as a serial killer, and just the second one, happened when 1994 he was sued, but found insane.
Pedro Alonso López was born in Tolmia, Colombia, in 1949. This was during a civil war in Columbia called La Violencia, or The Violent. He was one of 13 children born to a prostitute.