Come to think of it this way. If there is even a 10% chance that this is true and the settlement would be at least in the range of $200M to $1B (wild guess), and the lawyer's fee is 30%, that's an expected payoff of $60M to $300M. Nothing to sneeze at.

Even if they lose, think about it, DLA probably already have some spin about how they are just being "professional" about due diligence and doing the best they could for their client. No loss in reputation.