Patriot's Day in Boston - April 15, 2013 - was an international event celebrated by hundreds of thousands. Every year since 1897, the Boston Marathon was the highlight of the activities and is the world's biggest annual event. Everyone was enjoying the day until 2:50 PM until two bombs went off near the finish line on Boylston Street.

Three people were killed and over 260 people were injured. On April 18, law enforcement zeroes in on two suspects, Tamerlan and Dzhokhar Tsarnaev, and the manhunt is on. Later the same day the suspects shoot and kill MIT police officer Sean Collier and carjack a driver in Cambridge.

Join us for the real inside story from former Boston police commissioner Ed Davis, who had a front-row seat to all the events.