According to government officials, Israeli spy, Jonathan Pollard, did more damage through espionage to the United States than any other spy in the history of espionage against the United States. Alan Dershowitz acted as (lead?) attorney in the legal defense for Jonathan Pollard. Originally sentenced to life in prison on March 4, 1987, he served only 28 years, and was released in 2015... Look at wikipedia article to show all of the people who plead for him to be released.
Jonathan Pollard, said he was inspired to pro-Israel activism while living in Texas, a state through which Jack Ruby and the Sonneborn Institute ran much of the arms smuggling to Israel.