CLAYTON CRAMER: How Common Are Deaths Like Trayvon Martin’s? “What I found quite startling as I compiled those reports over the years is how few incidents I found where concealed weapon permit holders used those guns in a way that was lawful but foolish. The case that was most obviously analogous to the Zimmerman-Martin tragedy took place in Aurora, Colorado, on November 13, 2004.” Going on 8 years ago.