A court battle over alleged industrial espionage and corporate raiding between two major defense contractors has turned especially ugly, with allegations of evidence destruction that was so rampant, according to the plaintiff, that the only proper punishment is to enter a default judgment against the defendants.

In a pair of lawsuits, Gentex Corp. claims it was the victim of a corporate raid when Armor Holdings hired away seven of Gentex’s engineers beginning in February 2006, some of whom allegedly stole secret Gentex files. Both companies had contracts to manufacture combat helmets for American soldiers.