Lucas Carr

Snapper Carr was a boy who was familiar with Mount Justice and the Justice League.

History
Superboy had a vision of Snapper Carr on July 8, when he was alone in Mount Justice for the first time. The vision implied that Snapper Carr had been affiliated with the Justice League while it was still headquartered in Mount Justice, and that he had become famous (at least among the League's enemies). The vision further suggested that it was Snapper that had (inadvertantly) revealed the location of Mount Justice to the Joker, who infiltrated the Cave while the League was elsewhere and attacked Snapper.