In a sane world the neighbor would get a reward for his good deed.
In a sane world he would not have been arrested. The thugs were in the neighborhood robbing people. The neighbor was in his own yard and suddenly there is someone who was not supposed to be there, and in my opinion, the neighbor became alarmed. In a sane world the cops would put all this together and submit it to the DA instead of arresting him.
In a sane world the neighbor would get a reward for his good deed.
Yup