Civil rights attorney Lynne Stewart was found guilty on Thursday of smuggling messages of violence to and from her former client, blind Egyptian sheik Omar Abdel-Rahman, to contacts on the outside.

The jury was in its 13th day of deliberations when it reached the guilty verdict. Stewart now faces up to 20 years in prison for her crimes. The counts she was convicted of include conspiracy and providing and concealing material support of terrorism.

Stewart has been a left-wing activist lawyer who often defended radicals and revolutionaries during her 30-year legal career. When the verdict was announced, Stewart wiped her eyes and shook her head in disbelief.

Two other defendants were also convicted by the anonymous jury. The first, a U.S. postal worker, Ahmed Abdel Sattar, faces life in prison for his part in a conspiracy to 'kill and kidnap persons in a foreign country' and for publishing a statement urging others to kill 'Jews and their supporters.' The final defendant, Mohamed Yousry, was convicted of providing material support to terrorists and faces up to 20 years in prison as well.

The bulk of the evidence presented against Stewart consisted of video and audio tapes of meetings she had with her client along with translations of various telephone calls she made.

Another key piece of evidence, according to prosecutors, was Stewart's release of a statement withdrawing the sheik's support for a cease-fire in Egypt.

Sentencing has been set for July 15 and she will remain free on bail until that time.