Ketamine was first developed in 1962. It is on the World Health Organization's List of Essential Medicines, the most important medication needed in a basic health system. It is legally sold under a very wide variety of brand names, including Ketalar.
If the crime you commit (generally just first degree murder) is in a state that does not have the death penalty then the only way you can be executed is if you are tried in a federal court as opposed to a state court.
A DPIC analysis of capital-sentencing statutes in effect in the 31 death-penalty states and the federal government found that 22 states, plus the federal government mandate an automatic life sentence if a jury cannot reach a unanimous sentencing verdict.