Death penalty: hearings before the Committee on the Judiciary, United States Senate, 101st Congress, 1. session on S. 32 : a bill to establish constitutional proce- dures for the imposition of the sentence of death, and for other purposes and S. 1225 : a bill entitled the "comprehensive violent crime control act of 1989" and on S. 1696 : a bill to amend title 28 of the United States code to prohibit racially discriminatory capital sentencing, September 19, 27, and October 2, 1989 (Senate hearing, 1991)