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In "Revelations," Martin Hacker told Matt "Your job was to get him (Goliath) there (to the Hotel Cabal). It's not your fault if old Mace couldn't hold him." In fact, since Matt gave Goliath the key and physically stopped Mace from shooting Goliath, it was indeed Matt's fault that old Mace couldn't hold him.
Was Martin unaware of Matt's involvement in Goliath's breakout, or was he deliberately lying to Matt?
For now, that's up to your interpretation. Matt assumes that no one but Goliath knows about Matt's complicity. Is he right?