He was affected by the water contaminated by Vanessa Zietgeist's regression formula, and attempted to tell the M.I.9 agents about how to solve the antidote by doing drawings.
He was affected by the water contaminated by Vanessa Zietgeist's regression formula, turning his mind into that of a baby. Even as a baby he attempted to tell the M.I.9 agents about how to solve the antidote by doing drawings.