The picture was posted on May 6, but didn't gain momentum until political group American Conservatives of Color posted the photo on their Facebook page Monday.

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The Black Lives Matter movement started in the wake of a series of deadly shootings involving police officers and African-Americans across the country.

On their website, Black Lives Matter members say they are “an ideological and political intervention; we are not controlled by the same political machine we are attempting to hold accountable. In the year leading up to the elections, we are committed to holding all candidates for office accountable to the needs and dreams of black people. We embrace a diversity of tactics. We are a decentralized network aiming to build the leadership and power of black people. We do not endorse any political party, and we are not supported by any political party. Our political aims we’ve stated clearly.”

Other groups have responded with "Lives Matter" campaigns of their own.