Keep Capital Punishment
For the most heinous, premeditated murders, death can be a constitutionally permissible and proportionate penalty when guided by standards, as upheld in Gregg v. Georgia (1976).
Some econometric studies report an association between executions and reductions in homicide, suggesting a possible deterrent effect beyond lengthy prison terms.
The prospect of a death sentence can increase guilty pleas to life without parole in death-eligible cases, which can avoid lengthy trials and appeals.