Martavious Taveros Johnson Homicide Martavious Taveros Johnson 17 YOA 511 Sumner Street Waterloo, IA Black Hawk County Thursday, January 5, 2012   Case Summary by Jody Ewing   Black Hawk County in Iowa   Waterloo in Black Hawk County Martavious Taveros “Tay Tay” Johnson, a 17-year-old former football player for East High School in Waterloo, […]