O'Connor was the senior presiding judge in many Mau Mau trials whom O'Connor sentenced to death in 1957 .
The senior presiding judge in many Mau Mau trials is the most notable being that of Dedan Kimathi .
O'Connor was the senior presiding judge in many Mau Mau trials , the most notable being that of Dedan Kimathi , whom O'Connor sentenced to death in 1957 .