He has maintained a private practice in refugee , immigration and human rights law since 1979 .
David Matas ( born 29 August 1943 ) is the senior legal counsel of B'nai Brith Canada .
David Matas has maintained a private practice in refugee , immigration and human rights law since 1979 .
David Matas ( born 29 August 1943 ) is the senior legal counsel of B'nai Brith Canada .