It’s well-known that Colin Kaepernick started his protest on the gridiron to bring attention to the police brutality and racial injustice plaguing this nation, but in a recent interview, the former quarterback reveals what specifically inspired his activism.

In an interview with Paper magazine, Kaepernick says the fatal police shooting of 26-year-old Mario Woods of San Francisco left him “with feelings of loss, pain, and anger.”

Ten months after the December 2015 death of Woods at the hands of San Francisco police, Kaepernick, then a quarterback for the San Francisco 49ers, took a knee during the playing of the national anthem before a game.

And a new arm of “the movement” was born.

Earlier this year, the San Francisco Police Department basically exonerated the five officers involved in Woods’ death, finding that the officers acted within department guidelines, according to the San Francisco Chronicle.

Woods was a suspect in a stabbing Dec. 2, 2015, when police saw him standing by a bus stop holding a knife. Police fatally fired on Woods after they said he refused their commands to drop the knife and seemed to be moving toward one of the officers.

Source: Colin Kaepernick Reveals the Source of His Inspiration for National Anthem Protest