Detective Tim Cooper with the Ada County Sheriff's Office spoke about his years-long work investigating the 1982 death of a man at Catholic church in Boise, Idaho.
Darin Oswald/Idaho Statesman/Tribune News Service/Getty Images
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As a small Catholic community in Boise, Idaho, was preparing for the Christmas season in December 1982, a man sitting in the back of the church collapsed.

First came the stunned churchgoers surrounding the lifeless body lying under a pew. Then came the rustle of investigators scouring the man’s belongings for any clue they might present.