Or grandma got tired of telling him to pull up his pants!
Or grandma was tired of having the only visitors to her home the Cops.
Or grandma was tired of listening to King Diamond played at ear splitting decibels.
Or Grandma found her beloved grandson had stolen her credit cards and the family Jewelery to Pawn.
Or Grandma was terrified of grandsons friends that came around and used her kitchen to make Meth.
It is one thing to kick out a child that you have raised and know you did your best to raise them up right.
A grandchild is another Critter, if your child did wrong in their upraising then one wants to rectorfie the problem with love and money.
Grandma now becomes the victim of 2 generations ago and feeds on their love and expectations.
Rose Kennedy at 90 had her grandchild steal her pain medication and lord knows what else. She Loved her grandchildren but to them she was just an abstract idea, a woman they saw once a year, their own parents were not involved in their life.
Grandparents that do get overly involved in the grandchildren life face the same thing. They rush in to help the child of their children with no thought that there are 2 generations separating them.
To get to the point where a grandmother will kill a grandchild is outside my understanding. What did this grandson do to push this old woman to kill him.