Well somebody figured this out faster than I did, and then they mentioned it and after a while it got simple to put the pieces together.
The only thing I find hard to trust is that changing your personality to continue to interact with the group would be exactly what the semi-sociopathic Chicko would do. But she wouldn't have the skills to do it too well, which says that your cognitive skills post-accident have improved. Chicko's various lies were easy to spot -- well, for some people -- other people required video demonstration of their impossibility
You must now come clean and admit, you put that staple in that dude's mailbox lock.