This April 2015 photo released by the Lexington County (S.C.) Detention Center shows Dylann Roof, 21. Charleston Police identified Roof as the shooter who opened fire during a prayer meeting inside the Emanuel AME Church in Charleston, S.C., Wednesday, June 17, 2015, killing several people.

Lexington County (S.C.) Detention Center / AP

This April 2015 photo released by the Lexington County (S.C.) Detention Center shows Dylann Roof, 21. Charleston Police identified Roof as the shooter who opened fire during a prayer meeting inside the Emanuel AME Church in Charleston, S.C., Wednesday, June 17, 2015, killing several people.