Forty minutes.  That's the time it took for supporters of Troy Davis and Chatham County prosecutors to present their cases before Georgia's Supreme Court today. Supporters want a new trial; prosecutors say the right man is behind bars.

39-year-old Davis is on death row, convicted of killing Savannah police officer Mark MacPhail in 1989. In July, the parole board granted a stay of execution one day before Davis was scheduled to die by lethal injection. His only hope now is a new trial. 

Crime & Safety Reporter Kaitlyn Pratt has been following the Davis case and brings us the very latest from this morning's hearing in Atlanta. (Watch the attached video for comments from Troy’s sister and the lawyers in the case.)

Lawyers for Troy Davis - and Chatham County prosecutors - each took an allotted 20 minutes to present their case before the high court. A key issue: the 7 of 9 original witnesses who have since changed their story, saying Davis was not the man who fired the gun in 1989, killing officer Mark MacPhail.

Prosecutors say the timing of those affidavits is too convenient. Davis supporters maintain those witnesses were coerced by police; at first, they were scared to tell the truth. Family members of the death row inmate are now putting their faith in the high court.

The state's highest court has six months to make a decision in this case, but we're told their decision about whether Troy Davis gets another trial could come as early as January.