Trayvon Martin didn't cause his own death. He was a 16 year old boy who wasn't committing any crime at the time he was being followed by an adult stranger. Martin ran away from him because thats what we teach kids to do when being followed by some one unknown, its called stranger danger. George Zimmerman was in his 30s at that time and as an adult should have been able to de-escalate the situation and could have by simply NOT FOLLOWING Martin to begin with. 

Martin and all of us We have a right to not be stalked nor do we have to answer any question by any person NOT A COP as zimmerman wasn't. Zimmerman provoked a confrontation and he knows it. The only reason he got off is because FLA state laws don't recognize degrees of manslaughter. And since he story is the only one told the DA went with that. BLM is born out of the fact that the judicial system is flawed and skewed in ways that disadvantage minorities.