Attorney General Eric Holder making the case to make changes to federal sentencing guidelines.

FOX News Radio's Jared Halpern reports from Washington:

Heavy-handed, lengthy federal prison terms should be reserved for violent criminals and drug king pins, Attorney General Eric Holder argues.

(Holder) "We need to ensure that incarceration is used to punish, deter and to rehabilitate, but not to merely warehouse and to forget."

Holder tells the American Bar Association he's directing the Justice Department to alter charges for low-level drug offenders with no ties to gangs or cartels.

Federal prisons are 40% above capacity. Half the inmates serving time for drug-related crimes.

In Washington, Jared Halpern, FOX News Radio.