Pittsburgh police are called for a domestic situation involving a man with a gun, but at some point, he allegedly tries to flush a 6-week-old child down a toilet.

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A man attempted to flush an infant down a toilet during an argument that police said turned in to an overnight standoff in Mount Washington.The incident began shortly before midnight at a home on Southern Avenue.Video: Watch Marcie Cipriani's reportPittsburgh police said they were initially called for a domestic situation. According to the criminal complaint 31-year-old Dennis Grateley and his girlfriend were arguing over the care of their infant son. Police said that is when Grateley grabbed his son, held him upside down and placed him, head first, in to the toilet."Who does that?," said neighbor Jessica Haines. "I just can't imagine it. It makes me sick. It makes me sad."The criminal complaint reads that several people inside the home managed to wrestle the baby away from Grateley, and that Grateley was then attacked by the family dog. Police said five people managed to get out of the home with the baby, who was taken to Mercy Hospital to be evaluated."Hearing someone doing something like that, I was shocked," said Haines. "I was literally shocked when I saw that this morning. I couldn't believe that actually happened."After the others escaped, police said Gateley remained in the home for about two hours after SWAT arrived, but eventually surrendered shortly after 2:30 a.m. and was taken to the hospital to be treated for the dog bite, then to the Allegheny County Jail.Gateley is facing several charges, including aggravated assault, simple assault, persons not to possess a firearm, terroristic threats and endangering the welfare of a child."I pray for him, and I pray for his family, and I hope that he gets the help that he needs," said Haines.Facebook Live report by Katelyn Sykes