Is there any chance of this guy actually being executed even if he is sentenced to such?
There are many states with active death penalty laws and convictions whose death row inmates are entering their third and even fourth decade living there. We haven't even come around to execute that Sgt. Hasan Akbar, the traitorous Islamist murderer who killed two officers from the 101st in Kuwait when they were staging for OIF in 2003. It's become a joke.
This is a federal trial, so death sentence is an option. But the jury is from liberal, death penalty averse Massachusetts, so there is a chance they jury will decide for life.
As far as how long, until an execution--McVey was put to death six years after his crime (federal case).