LOS ANGELES (Reuters) -- Private investigator Milo Speriglio, who maintained Marilyn Monroe was murdered in a Mafia hit, has died of lung cancer at age 62, the Los Angeles Times reported on Sunday.

In 41 years as a detective, he was perhaps best known for the three books we wrote and co-authored, attempting to debunk the official reports of Monroe's death by suicide. Speriglio also investigated the deaths of actress Natalie Wood and TV "Superman" George Reeves.Speriglio investigated Monroe's death for two decades, and argued she was the victim of a mafia hit from Chicago, ordered by family members of President John F. Kennedy.

Family members said he died on April 30, leaving a wife and two daughters, the paper said.

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