On Tuesday, Mr Clarke told MPs mandatory sentencing was "rather an American thing" and to have a situation in which, for example, a 13 was automatically imprisoned without a judge being able to use his discretion would "rather go against how we normally approach the sentencing of juveniles".
The retired chief judge of the Mississippi State Court of Appeals needed to break 4:10 to automatically qualify for a return trip to Boston to run in the 2014 marathon.