This document discusses arguments for and against capital punishment. It notes that the death penalty is legal in 32 US states for first-degree murder with aggravating circumstances. Supporting arguments include that it delivers justice for heinous crimes, deters future murders by convicted killers, and prevents innocent lives from being lost to murderers who would otherwise still be alive. Opposing arguments are that some notorious murderers have avoided the death penalty and that capital punishment costs taxpayers more than life imprisonment. Studies on whether it deters murders more effectively have reached different conclusions.