Thaddeus William Mitchell Homicide Thaddeus William Mitchell 44 YOA St. Joseph Avenue near 20th Street Des Moines, IA Polk County December 7, 1922   By Aaron Brilbeck | December 2, 2010 WHO-TV, Channel 13, Des Moines COLDEST CASE: Des Moines Police Doubt They’ll Ever Solve 88-Year-Old Murder WHO-TV Channel 13’s Aaron Brilbeck reports on the […]