Again they already do this through deployment of deadly police forces to serve their warrant and they hope you resist so they get the chance to kill you, and if they don't kill you and you comply, you are fucked but in a different way, locked up in their judicial system and they take your house and your family and find other ways to fuck with you.
The death penalty is meant to serve the people and they took it away because they prefer to execute normal people in the streets rather than let the people decide through a jury.