Revealing mistake: When Chucky follows Lexy as she's about to open the door and let the other kids into her house, the way Chucky is moving is very unnatural. He's moving less like he's walking and more like he's on some sort of track. He's moving more like he's gliding than walking.
Give Me Something Good to Eat - S1-E2
Revealing mistake: When Chucky is walking around on the street in the "Hello Kitty" mask, you can tell it's someone in a costume, primarily because you can see a little bit of their (very fleshy) neck at the bottom of the mask a few times.
Answer: They were blamed for the death of Jake's foster brother, which was deemed a terrible accident, and they were sent to the reform school as a punishment. Presumably, when they had to leave the reform school given what happened, they were instead given community service as punishment.
TedStixon