A group of black Tacoma firefighters said they won’t allow department leadership to blame minority applicants and the city’s hiring policy for what happened with Ramsey Mueller, the son of a deputy chief and a probationary firefighter who died of a heroin overdose days after showing up late to work and nearly hitting another vehicle while driving a firetruck. Brian Hardy, who said he was speaking on behalf of the Tacoma Black Professional Firefighters, read a letter that was sent to former city manager T.C. Broadnax and Mayor Marilyn Strickland in February to the City Council at Tuesday night’s meeting.