The American Civil Liberties Union is asking a medical board to suspend certification for an anesthesiologist expected to participate in upcoming executions in Missouri.
Earlier this month the Missouri Supreme Court set execution dates for two convicted killers, the first on Oct. 23. The executions will be the first since Missouri switched from a three-drug method to a single-drug protocol.
Missouri will also become the first state to use the anesthetic propofol, raising concerns among some death penalty opponents who say the unproven drug could cause pain and suffering for the inmate.
The ACLU cites says court documents showing that the state plans to use an anesthesiologist identified only as "M3."
The ACLU wrote to the American Board of Anesthesiology on Thursday seeking suspension of his or her certification.