1.The bloody massacre- was a deadly riot that started between an American colonists and a lone British soldier, but quickly escalated to a chaotic, bloody slaughter.
You can trust this source because if shows the British soldiers killing the colonists
2.it was both sides fault Because the colonists should not have taunt the British soldiers but also the soldiers because they should don’t have fired without Captain Thomas Preston's command
You would need both sides of the story in full detail