Troy Davis convicted of the 1989 killing of an off-duty Savannah police officer is to be executed today September 21st. This is the fourth time in as many years that officials of the state of Georgia set an execution date.  Troy Davis wants a polygraph test in a last-ditch bid to show his innocence, Amnesty International USA said.

Davis’s execution, set for 7 p.m. local time on Wednesday. The Georgia Board of Pardons and Paroles denied him clemency on Tuesday.

“Troy is so insistent of his innocence that he is willing to take a polygraph. I think it’s a bit of a risky strategy. Polygraph tests are not the most solid type of evidence,” said Laura Moye, a spokeswoman for Amnesty.

Since his conviction, seven of nine witnesses have changed or recanted their testimony, some have said they were coerced by police to testify against Davis More >

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