It is not lying, not completely, but - [Here's another thing he never imagined telling anyone, but Romain already knows about Fallon. If he's digging himself a hole by doing this, it can't get that much deeper, can it?] - somehow, everyone is at fault. I am not sure of the word, but no one is given any -

[Nope, he can't get to it. What he means is mitigating circumstances, genuine reasons rather than excuses, things like self-defense, for god's sake: no consideration, just their acts, in the worst light possible.]