I feel sorry for the perps kids, too. It's not their fault that their father did this. Their lives will probably be ruined also.
I do too... His whole family is no doubt going to be going through some very hard times as they try to figure this out, especially his children. I haven't heard anyone mention past problems with this person as of yet, either. I'm sure they will be blaming themselves, even if there was no signs of impending trouble, and nothing they could have done to prevent this...
I pray God will comfort his wife and children.