I don't believe in the death penalty. There is literally zero benefit other then vengeance for the family of the victim.
It isn't cheaper then life in prison
It isn't a deterrent
Too many innocent people have been wrongly put to death. It's subject to the same biases as the rest of the justice system (racism, sexism etc)
A family member worked in America for a charity that acted on behalf of death row inmates, appealing their death sentence so a first hand view of photos of victims, horrific crimes that she has trauma from but she has also seen the complexity and flaws of the system and is a staunch anti-death penalty advocate. This in the face of the utter despair and heartbreak of the victims family.
I do think that there should be a tiered system here.
Accidental death - (eg allergic reaction out of genuine ignorance) no sentence.
Careless death (parent not watching child and they get hit by car, careless driving) up to 10 years.
Defensive murder (killing an abusive partner) 0-10 years depending on circumstances.
Unpremeditated murder (murdered a spouse when finding them cheating, heat of the moment) up to 20 years
Premeditated murder (poisoning, any planned murder. These are the people you really have to worry about) 20 years absolute minimum custodial sentence.
Murder or premeditated murder with additional brutality. Any torture/rape before the murder, any tampering with the body. 30 years minimum. With an unwritten rule that they never get out. These are the broken phycho serial killers