In South Carolina, death row prisoner Brad Keith Sigmon is scheduled to be killed by firing squad Friday in the state’s first-ever use of that execution method, and the first firing squad execution in the U.S. in 15 years. Sigmon’s lawyer has called for clemency for his client, who he says suffers from mental illness, brain damage and the effects of drug abuse. Sigmon’s lawyer says he chose execution by firing squad due to fears over lethal injection, which is “shrouded in secrecy.”