Alva Review-Courier -

While medical experts say it's unclear why an Oklahoma inmate began convulsing and vomiting after the first of three drugs used to execute him was administered, all agree the dosage was massive compared with what's standard in surgeries — with one doctor calling it "insane."

The state's prisons agency is now likely to face new litigation, which may focus on the state's description of the execution of John Marion Grant for the 1998 slaying of a prison cafeteria worker as "in accordance with" protocols.

Grant, 60, convulsed and vomited after the sedative midazolam was administered. That drug was...