(ONN) – Governor DeWine has delayed next month’s execution of a condemned Ohio man and has ordered the prison system to look at alternative lethal injection drugs.

The announcement by the Republican governor followed a federal judge’s ruling earlier this month that said Ohio’s current execution protocol would cause the inmate needless suffering.

Warren Henness was scheduled to die by lethal injection Feb. 13 at the Southern Ohio Correctional Facility in Lucasville.

Henness was convicted of killing 51-year-old Richard Meyers in Columbus in 1992.

Henness’ attorneys argue the death row inmate may be innocent and say two co-defendants provided the only evidence of Henness’ guilt.