Are we talking about the kid at the end, with Bill? He could be from overseas; a lot of Somali refugees moved to Minnesota, so he might have had assistance in adapting past the normal age cutoff. Forgive me if we're talking about someone else; I watched the episode mid-last week and didn't rewatch that bit for my post. SPEAKING OF MY POST:
Here's my post about a great Molly moment in the episode.
@HunterHunted: after the time jump, Gus isn't a cop anymore. He's now working for "U.S. MAIL" (pointedly NOT the USPS, I guess because they wouldn't sign off).