He had him sent to prison. He had him left for dead when the Locust Horde invaded. Hoffman did all these things and more to Marcus, yet never had Marcus hated the sound of Hoffman's voice more than when he radioed to report the resonator didn't work. The blast wasn't powerful enough to map even a fraction of the Locust tunnel network - the crew would need to find another way, and Baird thinks he has the solution. He hacked into a geobot and found an immense amount of data concerning the Locust tunnels. Anya has traced the data back to the residence of Adam Fenix, Marcus' deceased father. The irony in Hoffman sending Marcus there to look for additional data isn't lost on the members of Delta Squad.