Not correct. Indonesian can have a "zero copula" where the conjugation of 'to be' isn't necessary. So in this case we could say "Di mana (berada) hakim dan pengacara itu?" but it's more typical not to use it. We use 'itu' here because we are asking after a specific judge and lawyer, not any judge and lawyer, so we need 'itu' or 'ini'. But since they're not here (if they were, we wouldn't ask where they are), we'll use 'itu' - specifying "those (distant ones)".