According to reason, Booker should still be in prison, serving his sentence without any release documents from the Judicial Bureau and Judicial Department. His presence here could only mean one thing, he had escaped!
The wealthy in the Bay Area believed that the Prison Director would not jeopardize his future to protect Booker. He must admit that Booker was indeed an escapee, though they had not disclosed it publicly.
Facing the police, Booker was clearly terrified. He looked at Sam with pleading eyes, seemingly begging Sam to save him!
But Sam could only pretend not to see; at that moment, his priority was to ensure his own safety before he could consider rescuing anyone.
Actually...he knew there was a high chance he wouldn't manage it. Once they decided to crackdown using "Red Lanterns", their fate was sealed!
"Take him back, interrogate him thoroughly, and make sure to extract how he escaped from the prison."