What was the "Boston Massacre"? What changes did Parliament make as a result of this event?

The Boston Massacre is related to the killing of five people by the England Metropolitan Guard and trying to end a demonstration in his US colony against the Townshend acts, a series of measures that raised taxes on products such as tea, the paper, ink and the glass. How the American colonies reacted violently and English soldiers clashed directly with the population. As a result of the Boston Massacre they repealed the law that made fee collection.