This psycho killer will get the best lawyers, paid by anti-death penalty NGOs, that are Federally funded out of Washingtoon DC. The kind of high paid lawyers that can delay his execution 20 years.
This is my guess.
The man who shot at FDR and Mayor Anton Cermak (killed) was tried and executed within 33 days
There is, of course, no Constitutional requirement or statute made by Congress that requires a mandatory appeal. They just made it up.