After his retirement in 1996 he and his wife lived in Laramie, Wyoming, where he continued theoretical work on the interpretation of experiments that might indicate anomalies in relativity.
Po odchodu do penze v roce 1996 žil s manželkou v Laramie ve Wyoming, kde pokračoval v práci na teoretické interpretaci experimentů, které by mohly naznačovat anomálie v teorii relativity.