Boat owner David Henneberry walked outside to have a cigarette after Governor of Massachusetts Deval Patrick lifted a curfew in Boston's Watertown, and discovered accused bomber Dzhokhar Tsarnaev in his boat.
Mr Henneberry is thought to have tipped off police, leading to the eventual capture of 19-year-old Tsarnaev.
Among those terribly injured by the Boston marathon bombs was a dance instructor. Adrianne Haslet-Davis lost her foot in the explosion.
The mother of the two brothers suspected of carrying out the Boston bombings told ITV News they saw last year's race but are innocent.
Boston's marathon bombing suspect Dzohkhar Tsarnaev was charged with an offence that could lead to the death penalty, if he is found guilty.