I think subtances/drugs do make a difference because they have different affects.
Being stoned on anything makes you a less affective carer but some drugs make people violent.
Weed doesnt tend to but synthetic skunk is more likely to.
Someone gouching on smack isnt going to give much of toss about a toddler playing with knives but they are not likely to punch them in the head either.
Crack and meth do make people violent and unpredictable. The high from crack is much shorter than from coke so users tend to get to the narky stage much quicker.
What the mother did was against the law. This was a case of private fostering and you have to infrom the authorities now (to prevent this sort of thing from happening).
If she had left her child with her mother or sister she wouldnt have had to inform anyone as this falls outside the new laws.
Of course the mother is culpable in this case. She left her kid with two people who were incapable of looking after him and then left them to it. But they killed him.
Call me a cynic but she will be telling her 'tragic story' in Take A Break in the next few weeks. No doubt she will be the victim.
I dont know why this gets to me more than anything else but the thought of that little boy wetting himself with fear just undoes me.