In previous episodes a lot of characters made the point that Ink might naturally go back to his old haunts. That was the justification for the recon missions to the house, hospital, jail, etc. I’m thinking that was a hint that the everyone has a proclivity to go back to familiar places. Jail would be an old familiar place for the Mallers. A room to room firefight verse a well prepared enemy would be a disaster even with the Mata gun.