I know they were sentenced for using a firearm in the commision of a crime.
The crime was what? Protecting the border and going after drug smugglers?
Shooting someone who was not threatening them.
And yes, I know they claim that their lives were in danger.
Of course, if their lives were in danger and the shooting was eminently justified one must ask: why tamper with evidence at the scene? Why fail to fire a full report?
That's the question the court had to consider.