If Dershowitz officially represented Pollard at trial, that’s news to me. I believe Pollard’s attorney at trial was named Hibey.
Later, on appeal, Ted Olsen (husband of the late conservative attorney and writer Barbara Olsen), who later became Solicitor General under W, represented Pollard. It turned out that Pollard’s conviction would have been overturned and he would have had a new trial had not Ruth Bader Ginsberg ruled against him on a procedural matter on a DC Circuit 3-judge panel back in the late 80s or early 90s.
Dershowitz’s role in the case was limited to commentator and pundit, to the best of my knowledge.
Please correct me if I’m mistaken.
Dershowitz did get involved in his appeal. I don’t know exactly what his role was and whether he worked for Pollard at the same time as Olsen or prior to Ted Olsen getting involved. If memory serves me, Olsen was hired by the Israeli government to represent Pollard.