"He'd had a few beers he says"
“I’m certain I did something to cause it,” Mr. Keehn says, but he’s not entirely sure.
He’d had a few beers he says.
Well then, tough shit. You don't fuck with critical infrastructure after you've "had a few beers". In fact, during the working day, if you're a systems engineer, you just don't, ever, have a few beers.
I can't help noticing that as well as this, the linked article describes him as "computer genius and conservative thinker", I may be adding two and two and coming up with the wrong answer, but frankly I'm reading all this as "Arrogant, drunken, bigoted jesus freak sacked for working on systems while tanked."
In which case good riddance.
YMMV, perhaps there's some definition of "conservative thinker" that I'm not aware of.