Nation ‘Mr. Bob,’ 88-year-old hero crossing guard, dies saving two kids from a speeding car February 19, 2020 Adrianna Rodriguez, USA TODAY Comments Off on ‘Mr. Bob,’ 88-year-old hero crossing guard, dies saving two kids from a speeding car "To Mr. Nill, our heartfelt gratitude for your selfless act in protection of our children," Kansas City, Kan. Mayor David Alvey said on Facebook.