Today marks the third anniversary of Trayvon Martin’s death. One of the organizations that grew out of the outrage, after, is called Million Hoodies, and they’re calling for supporters to shut protest at their local hall of justice.

The hashtag #HoodiesUp has also been used widely on Twitter to mark the anniversary. Overall, it’s been a particularly difficult week to mark the ocassion. On Monday the Department of Justice announced that it would not bring federal civil rights charges against George Zimmerman, the man accused and then acquitted of killing Martin. That led Martin’s father, Tracy, to tell BuzzFeed that he thought the bar for proving hate crimes was too high. “The state tried and failed. The Justice Department didn’t feel there was enough evidence, there’s nothing left to do but continue to fight for kids like Trayvon,” Martin said.