Juan Cornoa was a Mexican-American serial killer whose heinous acts shocked the nation in the eary 1970s. He was convicted in 1973 of the murders of 25 men, mostely transient farm workers. He remains one of the most infamous instances of serial killing in American history.
Sources for this episode:
Wikipedia - Yuba City, California
Wikipedia - Autlán
Wikipedia - Sacramento Valley
Wikipedia - Juan Corona
NY Times - Corona, 85, Convicted as Killer of 25 Farm Workers, Dies
Criminal Minds Fandom - Juan Corona