He studies the interface between clinical anesthesiology and the drugs and techniques used in lethal injection. In his research, he has interviewed executioners, wardens, physicians, nurses and death row prisoners; inspected 10 lethal facilities; and provided legislative testimony in multiple states and the UK House of Lords. He is opposed to the medicalization of capital punishment, does not support the current death penalty system in the United States and serves as an expert witness on behalf of condemned prisoners facing execution by lethal injection.