Due to a lack of evidence or clues, he had a hard time solving this fresh case and his access to the resources were limited. Moreover, he cannot risk further hacking into files of the locked resources, not violating the rule. If he gets caught conducting such unauthorized operations, they will revoke his agent license and the government will terminate their contract with him.
Due to his limited access to the authorization of the top secret files from the government, he couldn't find out what was hidden in those top secret files. They surely would have been carrying important information, but there were way too many risks in retrieving them.
Martin was known to be a political astute. His skills were professional, and he never missed an opportunity to get his way and use them to his advantage. His grasp on the cases and the significant infiltration was too strong, even the government praised him for his work.