OKLAHOMA CITY (AP) — Oklahoma has executed more people per capita than any other state in the U.S. since the death penalty resumed nationwide after 1976, but some Republican lawmakers on Thursday were considering trying to impose a moratorium until more safeguards can be put in place.

Republican Rep. Kevin McDugle, a supporter of the death penalty, said he is increasingly concerned about the possibility of an innocent person being put to death and requested a study on a possible moratorium before the House Judiciary-Criminal Committee. McDugle, from Broken Arrow, in northeast Oklahoma, has bee...