Board Thread:General Discussion/@comment-30530877-20161117231236

How did Sozin know he didn't kill the air bending avatar (Aang) ?

He knew he didn't and he spent the rest of his life searching, but, how did he know.

Aang was amoung air benders who look like him. He didn't stand out. Would something special happen if someone killed the avatar being them know they killed the avatar ?  