The worst punishment possible is not enough for what these 2 should get...obviously if they are found guilty.
There was a case couple of years back in my neighbouring town, where a father took his 2 young children, the car and a hosepipe and ended their lives. In the press afterwards it was all about how he was such a good father, helpful in the community, very popular, not the sort of man to do such a thing etc etc.....sorry but that man was a B#####D, Coward.
Anyone who hurts or kills their children should suffer the most horrendous punishment possible....not put in a cosy cell for us to look after, makes me sick!