Martin, 17, was unarmed when he was gunned down in Florida in February 2012 by a neighborhood watch volunteer. Brown, 18, was also unarmed when a police officer shot him at least six times in Ferguson, Missouri, in 2014.

Nugent previously called Martin a “dope smoking, racist gangsta wannabe” who was “responsible for his bad decisions and standard modus operendi of always taking the violent route” in a column for the conservative news website Rare. After news reports noted that former Attorney General Eric Holder said the Department of Justice would continue an investigation into Martin’s shooting, Nugent attacked him on Twitter, calling him “soulless” and saying he is “a blackpanther supporting blacks attacking nonblacks.”

The NRA board member later doubled down on his attacks, calling Martin an “enraged black man-child” and urging Martin’s killer to sue the teenager’s parents for “emotional pain and suffering.”

Referring to Brown’s death, Nugent previously told parents to not “let your kids growup to be thugs who think they can steal, assault & attack cops as a way of life & badge of black (dis)honor.” He also tweeted that the officer who shot the unarmed teenager “did good” and that “justice is served.”