CONTEST: Final chance to enter Priority Automotive CBS 6 $600 Gas Card Giveaway

Social media critical in search for Boston bombers

Dzhokar Tsarnaev, age 19

(CBS) – John Miller, former FBI assistant director, and former Boston Police Commissioner Bill Bratton speak to the “CBS This Morning” co-hosts about how the FBI, along with the help of the public, identified the suspects in the Boston Marathon bombing.