Ender indeed has maintained this! To paraphrase from my post #156:
Ender claimed (in post #147) that the severity of the punishment
must be commensurate with the severity of the crime. And in #153 Ender maintained that the
only punishment that has the necessary severity for the crime of murder is the murderer’s own death.
Very clearly, then, Ender has stated that the punishment for murder
must be the death penalty. (When I queried that this is at odds with 2667 of the Catechism, Ender simply stated that this paragraph is not official Church teaching, but merely prudential judgment.)
Exceptions can be made if carrying out the death penalty would be against a greater good, but again this is a “prudential judgment” area. The bottom line is that Ender says that the by-the-book doctrine of the Church demands the death penalty.