“...what evidence of a crime Zimmerman observed that caused him to pursue Martin? ...”
“Pursue?” As in walk in the same direction?
Okay...let's see:
In a GATED COMMUNITY, a Neighborhood Watch person observes a black youth, face hidden in a hoodie, wandering through and follows him to see that he's not up to "no good".
Then, the black Yewt decides to confront the white person following him, and proceeds to use his superior size to beat him to a pulp.
After bashing the white Watch person's head on the ground, and breaking his nose, too, the white person fears for his life (not un-expectedly) and pulls out his LEGAL gun and defends himself.
Now, what part of "Neighborhood Watch" are you having trouble with?
Yabut was he following or pursuing? I s following a crime?