Pedro Alonso López (born October 8, 1948 in Santa Isabel, Colombia) is a Colombian-born confessed serial killer, accused of killing more than 300 women across South America. Aside from uncited local accounts, López’s crimes first received international attention from an interview conducted by Ron Laytner, a long time freelance photojournalist who first met López in his Ambato Prison cell in 1980. Laytner’s interviews were widely published, first in the Chicago Tribune on Sunday, July 13, 1980, then in the Toronto Sun and The Sacramento Bee on July 21, 1980, and later in many other North American papers and foreign publications over the years. Apart from Laytner’s account and two brief Associated Press wire reports the story was published in The World's Most Infamous Murders by Boar and Blundell. According to Laytner’s story, López became known as the "Monster of the Andes" in 1980 when he led police to the graves of 53 of his victims in Ecuador, all girls between nine and twelve years old. In 1983 he was found guilty of murdering 110 young girls in Ecuador alone and confessed to a further 240 murders of missing girls in neighboring Peru and Colombia.