All dangerous felons in Illinois are now required to take DNA tests.
A new law signed by Gov. Rod Blagojevich requires felons who are serving life sentences and were convicted more than three years ago to take the genetic-marker tests.
Since August 2002 every felon has had to give a DNA sample for police to keep on file for comparison to evidence in unsolved crimes.
But it didn't apply to 208 lifers who had been in prison since before then. The other 1,100 inmates serving life sentences and the six on death row already have been tested.