 He became widely known as "the man in the wheelchair at political rallies, who is rarely absent from a courtroom during political trials, and at mention of whose name students around the country were smiling with admiration.A testimony of Princen's activities in that period – a man already more than seventy years old and with a rapidly deteriorating health – was provided by Ed McWilliams, a former officer of the US Foreign Service presently residing at Falls Church, Virginia