Crispus Attucks (c. 1723 – March 5, 1770) was an American whaler, sailor, and stevedore of African American and Native American descent who is traditionally regarded as the first person killed in the Boston Massacre, and as a result the first American killed in the American Revolution.
Although he is widely remembered as the first American casualty of the American Revolutionary War, 11-year-old Christopher Seider was shot a few weeks earlier by customs officer Ebenezer Richardson on February 22, 1770. (From Wikipedia)
I recently became aware of Sieder and believe his story is worth of mentioning.
https://newenglandhistoricalsociety.com/christopher-seider-the-first-casualty-in-the-american-revolutionary-cause/