jack henry doshay , 22 , was arrested at a residential facility wednesday where he was receiving treatment for depression .
authorities say he tried to kidnap a 7-year-old girl from a solana beach , california elementary school on march 23 .
on friday , doshay pleaded not guilty to charges of kidnapping , false imprisonment with violence and child cruelty in his first court appearance .
he is the son of prominent san diego businessman glenn doshay , who is a minority owner of the san diego padres baseball team .