The military said preliminary reports do not indicate the crash was caused by enemy fire, and the cause is under investigation.
The gunman had been married to the woman he killed, and the man fatally shot is believed to have been dating her, police said.
The police chief said that investigators believe the gunman was angry and looking for a girlfriend when the home invasion occurred.
Federal law doesn't let the Justice Department choose its own method of executions, a district judge ruled.
"The government failed in its attempt to criminalize basic human kindness," border activist Scott Warren said after he was acquitted.