David Walker on Crime

Death penalty only when DNA evidence & jury are conclusive

A: Yes, for very few crimes and subject to DNA testing. DNA should be used when possible and if it's conclusive then the death penalty is acceptable. If DNA can't be used, or it's not conclusive, then either they're deemed innocent, or they're not subject to the death penalty. To impose the death penalty should require a finding of guilty by a jury of one's peers, AND conclusive DNA testing.

Mandatory sentencing only for limited severe crimes

A: Yes, but for a limited number of crimes. Not for marijuana use, as an example. For the record, I don't smoke marijuana. And I don't have glaucoma.