Looking up the methods used by state for something else, found this at
Wikipedia
(<
http://en.wikipedia.org/wiki/Capital_punishment_in_the_United_States
>):
"The method of execution of federal prisoners for offenses under the
Violent Crime Control and Law Enforcement Act of 1994 is that of the
state in which the conviction took place. If the state has no death
penalty, the judge must choose a state with the death penalty for
carrying out the execution. For offenses under the 1988 Drug Kingpin Law,
the method of executions is lethal injection."
leading to the question:
"With his own drugs?"