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Kim Byers will never forget the strange contractor who walked into her job and later murdered her childhood friend.

On Dec. 11, 1978, John Wayne Gacy walked into Nisson Pharmacy in Des Plaines, Illinois, to take measurements for what he called "a possible facelift," or a remodeling job for the store owner. Robert Piest, a local high school student and part-time employee, was working alongside Byers — his friend and classmate. It would be the last time she ever saw him alive.

Gacy was convicted of killing 33 young men and boys in the Chicago area during the 1970s. Most of the victims’ remains were discovered by authorities in a crawl space beneath his home or buried elsewhere on the property.

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