Don't be quick to assume something if you don't know the whole story
You killed him Charlee, you shot him dead
Why is your car starting? Maybe you did it
Maybe it was Tommy. He was the one who told us about them.
In the first drawing it shows Charlie, Pete Van Horn, and the other neighbors of Maple Street. It shows Pete on the ground, shot dead. This goes with the theme because Charlie thought Pete was a monster and shot him. Because he was quick to assume he ended up killing Pete. In the second drawing, it shows everyone accusing Goodman of being one of the monsters because his car started and Steve's car wouldn't start. That shows that they would use any evidence that they could think of blame someone for all of this. In the last drawing, it shows everyone accusing Tommy of being the monster because he was the one to tell them about the aliens. This shows that they would go so far as to accuse a child.