OMG! Potty training takes a lot of patience which this guy clearly did not have. Shame on the mother for allowing this live-in boyfriend to be alone with her child.
From the article linked above:
The child's 20-year-old mother, who has not been identified, is under investigation, Deters said.
"I don't understand the need to have a man in your life so badly you are willing to place the safety of your own child at risk," Deters said. "(Smith) should not have been left alone with this child."