Attorney General Eric Holder is set to unveil a key new policy aimed at curbing lengthy sentences for drug violations and reducing the overcrowding of U.S. prisons. The policy shift will bar prosecutors from noting the specific quantity of drugs involved when drafting indictments for minor drug cases. By omitting the number at that stage, the policy may help low-level drug offenders avoid harsh mandatory minimums triggered by certain amounts. Holder will also announce policies aimed at turning more crimes over to state courts and expanding drug-treatment programs as an alternative to prison.