Swampwater 0
According to the story, they got drunk, defied orders to remain within their base or whatever they call it, went for a joyride, and killed two persons.
For now, the mercenaries remain in the dock:
U.S. District Judge Robert G. Doumar quickly dismissed that notion.
“You’re asking that he be sent back to Afghanistan” to face charges there? Doumar asked Cannon’s lawyer. “Is that what you really want?”
“That’s not an option for this court,” said Assistant Federal Public Defender Larry Dash, one of Cannon’s lawyers.
More at the link. The story isn’t real clear, but, based on the excerpt above, the defense strategy seems to be that no one has jurisdiction.