Children are not disposable and a child should never end up in a dumpster like a piece of discarded trash. My heart is hurting right now for this child, his siblings and his mother.
If the father snapped due to a potty training accident and this was not continued abuse - it doesn't make me feel better. My mind can't help but think about how scared you would be as a child, having your parent lose control and hurt you. The shock, confusion and hurt you would feel. It is so unfair and unfortunately, we see it way too often.
As a mother of a 4 year old girl and 3 year old boy, I understand that potty training can be stressful. My daughter was fully trained at 2 and my son at 2.5. My daughter picked up on it right away and was trained in a day. With my son, he thought peeing on the floor was funny at first and nothing in the house was safe. I tried several times with him and had to put myself in time outs at times due to frustration. Each time, I would realize that he just wasn't ready and there was no reason to be upset with myself or frustrated with him. Punishing a child for having an accident is never the answer. New carpets, furniture, etc. are not worth the life of a child.
I just wish more parents had a plan. Something you can do if you feel you are in a situation that may cause you to do something you regret. I grew up reading about mothers and fathers who hurt or killed their children after losing control due to potty training, colic, etc. My mom always told me if I ever became frustrated or upset and needed someone, she would be there at the drop of a hat to help me. I have yet to take her up on that offer, as my children were a breeze and she lives an hour away, but I have called her before - just to hear her soothing voice.
Anyway, my "plan" was to give myself a time out if I ever felt like I was in a situation that could possibly drive me crazy. When my son would pee somewhere - gleefully - over and over, sometimes it would get to me. We'd make a ton of progress and then go back to square one. I wasn't mad at him, I was just frustrated, and I didn't want him to think I was angry at him. A few times, I had to put him in his room, put up the baby gate and sit outside of the room where I could see him - just to breathe and think clearly.
RIP little Maurice (if this is him, as we think it is).