 Following several years of appearing via telephone, Mengering (usually billed as "Dave's Mom" or "Dave's Mom Dorothy", with no mention of her surname) became a recurring on-camera guest on Letterman's subsequent "Late Show", initially by covering the 1994 Winter Olympics in Lillehammer, Norway.She lived in Carmel, Indiana, at the time of her death.Dorothy Mengering was born Dorothy Marie Hofert in Linton, Indiana, the oldest child of Lena M. (née Strietelmeier) and Earl Jacob Hofert.