User blog comment:Thailog/Ep. 204 "Salvage" discussion/@comment-4821105-20120517201451/@comment-5012837-20120518193308

if you didnt know this, Lucas Carr use to hang out with the Justice League in Mt Justice when he was a kid before the Joker found it, so he knows their identities and their headquarters, but he is a good guy and they trust him enough to homeschool beast boy in the cave.