The Monsters Are Due on Maple Street Theme: Fear and suspicion are distinctive fores
It was the kid
The first evidence connects with the theme because when Goodman´s car went on by its self they started to attack him say that he is an alien. The second evidence connects also because everyone just saw a shadow and didn't know who it was so Don shoot him because he was scared and thought he was an alien. The last one connects with this theme because when Don shoot Pete everyone was also attacking him and he was nervous and scared so he said the kid was it because he was the first one who knew all about it.
Evidence 1 : In this scene Goodman's car turns on so everyone goes up to him
Evidence 2 : In this scene Don shoots Pete beause he thought he was an alien or something
Evidence 3 : In this scene we have Don saying that it was the kid because he didn't want everyones eyes on him