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In page Leno Prestini:

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In 1961 his mother, who he had lived with most of his life, died after a long illness. Prestini generally maintained his outward cheer, but during a March 1963 visit to his brother Battista, then living in California, he was visibly distraught. Battista alerted friends and local law enforcement in Clayton to Leno's condition, but shortly after he returned home, Prestini shot himself in the head.[1] He died a month later, on April 26, 1963, at a care facility in Spokane. He was 57.[1]