Trayvon Martin: Diddy, LeBron James, Dwyane Wade tweet support for Million Hoodie March

After the tragic shooting of unarmed black teenager Trayvon Martin, his killer, George Zimmerman has not been arrested -- because Zimmerman claims he was defending himself and that Martin appeared threatening. (Martin was carrying only candy and iced tea, very very scary substances.)

Geraldo Rivera claims that Martin's hoodie presented him as a threat. Demanding that Zimmerman be prosecuted, supporters of Martin's family staged a Million Hoodie March on Wednesday as a call for justice.

Some of the highest-profile celebrities tweeted their support for the march. Sean Combs posted an Instagram photo of himself, hoodie-clad, supporting Martin. Members of the Miami Heat, including Dwyane Wade and LeBron James, also took a photo of themselves in hoodies, with the hashtag #WeAreTrayvonMartin. Gabrielle Union, Carmelo Anthony, Will Ferrell, Gilles Marini and more have also tweeted their support.