My friend is here in the US with his daughter. He was let go by the immigration with an ankle bracelet. What can he do so he can stay here and work?

Much more information is needed to determine what, if any, immigration benefits may be available to your friend. Additional information is needed about his immigration history including his date and manner of entry, his daughter's immigration status, and whether he was previously ordered removed. You can read more at http://myattorneyusa.com/removal-and-deportation-defense.