It most probably was the wrong thing to do, but just imagine being in the situation of this guy. I guess every of us who has children already would think of doing the same thing... even if you would be sure you will spend years in jail for this.
I don't know the situation in the US, but it pisses me off, that in europe when someone is drunk he will be punished less then when he is sober. That's bullshit. "Oh, he killed two kids... BUT he was drunk, so he didn't know what he was doing". It should have be "He, killed two children AND additionaly was drunk too... we should make him work in a coal mine for the rest of his life 20 hours a day, seven days a week".