Too Old to Rock and Roll, Too Old to Die?

Poor Governator. First he has to deal with the clemency petition from "Tookie" Williams, now he has to deal with another unusual clemency request. Clarence Allen is scheduled to be executed in California next Tuesday because of four murders for which he was convicted in 1982. The twist? Allen is now 75 years old and not long for this world, execution of no execution:

The 75-year-old Allen, involved in the murders of four people, is diabetic, legally blind and confined to a wheelchair outside his cell. He has had two heart attacks and a stroke and is too weak to grant interviews, one of his lawyers says.

In other words, is there anything to be gained by executing someone who is barely two steps ahead of the grim reaper in the first place?