I can’t answer this as fact but the facts we do know would lend to Zimmerman NOT knowing Trayvon was talking on the phone.
Trayvon’s girlfriend said Trayvon was using a headset and that Trayvon threw up his hoodie when he realized Zimmerman was watching him.
This leads me to suspect that is why Zimmerman thought Trayvon was possibly scoping out houses and perhaps on drugs.
He sees a kid probably meandering, distracted a bit while in conversation (on this unseen phone) talking to what would look like himself.
Sometimes people look up and stuff when they talk on the phone, watch people shopping and getting in your way at the grocery store! hahaha!
They pause and are distracted in conversation. If one didn’t realize that somebody was on a phone—it would appear insane. Plus the kid is walking in the rain, threw up his hoodie when he notices Zimmerman.
I have also wondered why Trayvon’s dad didn’t just drive him to the store or let Trayvon drive if he had a license. It was raining and it wasn’t halftime as the story is told, it was before the game. The game started at 7:30pm est.
The dad is also the one that told police that it wasn’t Trayvon screaming for help on the tape. I am wondering a bit about the dad. I know that is bad but I am.
His father is not going to drive him a couple of blocks, when they live in a reasonably safe neighborhood and it’s only a bit after 7pm.
I’m sure the father thought that nothing would happen to his son in the approximate 20 minutes he’d be gone.