Originally Posted by Agent Nationaux
Testing isn't exactly the best way to make sure the bowler is consistent in a match and in the lab. However they do compare the bowlers action in the lab with his action in a match. They make sure that he is bowling at the same speed and puts the same revolution on the ball as he does in match conditions. How is it that Botha got caught by the ICC bit Ajmal hasn't? Is Ajmal more sneaky and clever than Botha?
Botha got caught because his doosra was measured at about 30 degrees IIRC.