ITV is to air a rapid-response documentary on the Boston Marathon bombing tonight at 10.45pm.
Seven Days in Boston, which features contributions from Washington correspondent Robert Moore and international editor Bill Neely, begins with the attack at the finish line of the Boston Marathon on 15 April, in which three people were killed and 183 injured by two explosive devices. It was the worst attack of its kind on American soil since 11 September 2001.
The documentary goes on to recount how speculation about the culprits, including widespread study of video images, culminated on 19 April with a police operation to arrest the chief suspects, Tamerlan and Dzhokar Tsarnaev. Tamerlan Tsarnaev died while trying to evade capture, while Dzhokar Tsarnaev was seriously injured and remains in hospital.
The new documentary replaces the scheduled programme, The Unforgettable: Larry Grayson.