LINCOLN, Neb. (AP) — Nebraska state Sen. Ernie Chambers is asking the Nebraska Supreme Court to sanction the attorney general for legal advice he gave over the state’s attempts to obtain lethal injection drugs.

The Omaha lawmaker filed a grievance Thursday with the Counsel for Discipline of the Nebraska Supreme Court.

Chambers, who fought for years to abolish the death penalty, alleges that Attorney General Doug Peterson advised state corrections officials to move forward with their efforts to obtain foreign-made sodium thiopental. The U.S. Food and Drug Administration has said states cannot legally import the drug.

Peterson has said court rulings cited by the FDA do not apply to Nebraska, and questioned the agency’s interpretation of those decisions. A spokeswoman for Peterson declined to comment.