20/20

A caught-on-tape report includes a New Hampshire traffic stop that led to two deaths, one a murder; a Florida mother hosing down her 2-year-old daughter at a car wash; and an altercation between an Arizona school-bus driver and a 15-year-old girl. Also: an assessment of the fitness benefits gained from walking in FitFlop sandals; a John Stossel report on a controversy surrounding police ticketing of motorists for failing to stop at Warren, Mich., stop signs.