When Imran took six for six from 23 deliveries, including a hat-trick, for Sussex against Warwickshire in 1983, umpire Don Oslear voiced his suspicions. Although Alvin Kallicharran, who saw the destruction from the non-striker’s end, deemed it the best bowling he had ever seen, others were not that effusive. England seamer Chris Old told the Daily Mirror, “I saw the ball [Imran] had tampered with, and it looked like a dog had chewed it.”
According to Oslear, “This was the first time I had seen one side of the ball scratched and torn with pieces of leather ripped out. The quarter seam had been opened up at a point where it meets the stitched seam and it appeared that some of the stitches had been cut. This allowed a triangle of leather to be pulled up from the surface of the ball, it was a piece large enough to be gripped between forefinger and thumb, and by which the ball could be suspended.”A report was sent to Lord’s.
the above statements point to the extend he went in this exercise.what if the umpires were too partial to the tampering parties? any way each to his own. i can't take such credentials built thru crooked means as an all perfect one. never.