Quoting the NYT obit:
Ms. Stewart was convicted in 2005 of helping to smuggle messages from the imprisoned sheikh [Sheikh Omar Abdel Rahman – DB] to his violent followers in Egypt. Her prison sentence, initially set at 28 months, was later increased to 10 years after an appeals court ordered the trial judge to consider a longer term.
Ms. Stewart, who had been treated for breast cancer before entering prison, was granted a “compassionate release” in January 2014 after the cancer had spread and was deemed terminal. Doctors at the time gave her 18 months to live.
Ms. Stewart’s critics and supporters did agree on one point about her 30-year career, which ended in disbarment with her conviction: Like William M. Kunstler and other lawyers who were proud to be called radical leftists, Ms. Stewart sympathized with the causes of violent clients who deemed themselves revolutionaries in America.
Some of her other clients included Weather Underground member David J. Gilbert, “convicted of murder and robbery in the 1981 Brink’s armored car robbery in Rockland County, N.Y., in which two police officers and a Brink’s guard were killed”, Richard C. Williams, “convicted of killing a New Jersey state trooper and setting off bombs at military centers and corporate offices in the early 1980s”, and the infamous drug dealer Larry Davis.