May 7, 1964 - Fernando Hernández Leyva
Active across five Mexican states before his 1986 conviction, Hernández Leyva confessed to killing approximately 100 people — a figure far exceeding the 33 counts for which he was formally convicted. The geographic spread of his crimes and the gap between confirmed and claimed victims reflect both the scale of the case and the investigative challenges it posed to Mexican authorities in that era.
From Wikipedia
Fernando Hernández Leyva (born 30 November 1964) is a Mexican serial killer. He was convicted in 1986 of 33 counts of murder committed in 5 different states of the Mexican union, but he confessed to killing around 100. Hernández Leyva's suspected number of actual murders amounts to 137, which would make him one of the most prolific serial killers in the history of Mexico. He was an organized killer, nomadic, hedonistic and motivated by interest.
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