On December 31, 1969, Joseph, his wife, and 25-year-old daughter were murdered in Pennsylvania as they slept in their beds. It was on this date in 1970, that the bodies were discovered by his son, and it was known that Boyle had hired hit men to do this deed. The day after the funeral, 20,000 miners walked off the job in a day-long strike.
In the aftermath of everything, a new president of the miner's group was chosen, and Boyle was indicted on murder charges. He was sentenced to three life terms and died in prison in 1985.
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