hoodies in the rain: super suspicious!
fact is that zimm had several chances to ask martin where he was going, what he was doing, and identifying himself as neighborhood watch captain. he did none of those things despite ample opportunity. if he would have just done that, martin would be alive today.
"ultimately avoidable by zimmerman"
Conformity is failure! ~ME
he had three opportunities: the initial contact, when martin drew his suspicion to call dispatch. he did not ask anything then.
the second contact, when martin wandered up to zimm's truck, parked directly in martin's path home.
and finally, after chasing him down, he aggressively and dominantly asked him on the final contact. "dominant" is how witnesses described zimm's voice.