Tennessee inmate argues defibrillator could cause torture during execution

What they're saying: In a court filing, Black's attorneys say he could be tortured to death if the device works as intended, delivering multiple rounds of shocks as the lethal injection drug pentobarbital takes effect.

• They argue that outcome would amount to cruel and unusual punishment that violates the U.S. constitution.

State of play: Federal public defender Kelley Henry filed a motion asking a state judge to order prison officials to find a medical provider to deactivate the device immediately before the execution.

• The judge will consider the motion at a hearing Monday morning.

Black has been on death row since 1989. He was convicted in the 1988 shooting deaths of his girlfriend and her two young daughters.

• Other legal efforts to stop his execution have been unsuccessful.