William Callahan, 54, and Wendy McDade, 29, were found shot multiple times and left in a field in the Chiwaukee Prairie area of Pleasant Prairie, Wisconsin, on March 18, 1981. Later accounts say both were shot three times in the head, a pattern that investigators noted looked execution-style rather than a spontaneous assault. The two had been seen leaving Chicago’s Continental Plaza Hotel on the night of March 17 and were discovered the next day roughly north toward the Wisconsin state line; what happened between those points has not been publicly established.

Callahan had a background as a Broadway performer and later became an executive with Arc Electrical Construction Company in New York. Federal tax-court records say he took more than $6 million in cash from Arc between 1977 and 1980; his activities were uncovered in September 1980, he resigned and left New York days later. Callahan reportedly remained legally married to Eleanor Rao but had a marriage ceremony with McDade in January 1981.

No arrest, charge, trial, or conviction has been publicly announced, and the Kenosha County Sheriff’s Office lists the double homicide as unsolved under case number 81-4200. Does anyone have information about Callahan or McDade’s movements in March 1981 or the people they met after leaving Chicago?