William Bradford Bishop, Jr. was last seen alive on March 2, 1976, at a sporting goods store in Jacksonville, North Carolina. His car was found at Elkmont in the Great Smoky Mountains National Park just over two weeks later. In addition to being an outdoorsman, Bishop had an American Studies Degree from Yale University as well as a Master’s Degree in Italian from Middlebury College in Vermont.

According to the FBI, just one day before he was last seen, Bishop allegedly bludgeoned his wife, 37, mother, 68, and three sons, 5, 10 and 14, to death in Bethesda, Maryland. The former U.S. State Department employee found out that day that he had been passed over for a promotion, the FBI says. According to the FBI, Bishop was described as “highly intelligent” as well as “intense and self-absorbed, prone to violent outbursts, and preferred a neat and orderly environment.” (Information Retrieved from Wate.com)