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*A number of first class cricketers have been accused of 'chucking' in their bowling careers.
BBC Sport Academy lines up the chief suspects. *
Suspect one: Shoaib Akhtar
Country: Pakistan
The world's fastest bowler was accused of chucking twice in 2001 because of his unique bowling style.
The controversy centred on his short-pitched bouncers.
*Shoaib's defence *
"The reason they are targetting me is because they can't believe how quickly I can bowl," says Shoaib.
The Pakistan paceman was filmed from various angles at 200 frames per second.
The report concluded that his action was legal and was due to "unique physical characteristics - that he had 'hypermobility' in both his shoulder and elbow joints."
Akhtar has had an abnormal upper limb in his bowling arm since birth.
Verdict: NOT GUILTY!
*Suspect two: Brett Lee
Country: Australia *
Lightening quick Lee was accused of 'chucking' in 2000.
The umpires found it hard to believe the Aussie ace was not bending his arm to clock speeds of nearly 100mph.
Lee's defence
The former Young Cricketer of the Year was shocked by the accusation.
"As far as I'm concerned my action is pure," he says.
His delivery was analysed by a bio-mechanist to provide a thorough and expert analysis of his bowling technique.
His action was given the all clear in August 2000.
*Verdict: NOT GUILTY! *
Suspect three: James Kirtley
Country: England
The England and Sussex paceman's action was put under scrutiny in the tour of Zimbabwe.
His action was reported but it has since been modified.
Kirtley's defence
"Admittedly, I use my wrist when I bowl."
"It's an important part of a fast bowler's make-up - it can add an extra two or three miles-per-hour to a delivery.
"But I do not bend my arm and I am NOT a chucker."
Verdict: NOT GUILTY!
Suspect four: Muttiah Muralitharan
Country: Sri Lanka
Sri Lanka's 26 year-old spinner, also known as Murali, faced a long struggle to clear his name.
Muralitharan's defence
Although it can look like he is bending his limb when bowling - it is just the way his arm is formed.
His action, therefore, should be within the rules.
It turned out Murali has a deformity in his elbow and he is unable to straighten his arm.
Verdict: NOT GUILTY!