The male caller to the North Versailles Police Department Sunday evening was hard to understand. But the words of the woman screaming in the background were unmistakable.

"Why did you do this to my baby?" she cried repeatedly. The woman then got on the telephone and told police, "He killed my baby!"

Allegheny County police Tuesday charged Michael Lewis, 54, of North Versailles, with homicide, endangering the welfare of a child, and resisting arrest in the death of his 3-month-old son.

Homicide Detective Michael Garlicki said North Versailles police received the emergency call just before 7 p.m. Sunday, but all they could make out was a male caller saying something about having taken a lot of pills.

But once the woman, Heather Cutruzzola, 26, got on the line and told them about her child, officers were en route to her apartment on Hyer Avenue. When they arrived, Ms. Cutruzzola ushered them inside, where they found the child, DeCarlos Lewis, unresponsive on the floor just inside the doorway and Michael Lewis seated on a nearby sofa.

Detective Garlicki said that while one of the officers performed CPR on the infant, another officer approached Mr. Lewis, who grabbed at him. A struggle with that officer and another who jumped in ended with Mr. Lewis being handcuffed and placed into a patrol car, police said.

Medics transported the baby to UPMC McKeesport, where he was pronounced dead at 7:41 p.m.

Ms. Cutruzzola told police that she had been seeing Mr. Lewis, the biological father of the child, for more than six years. They had started living together four months ago, she told police, despite the fact that he was occasionally abusive to her.

According to the arrest affidavit, Ms. Cutruzzola said she went to the store Sunday evening, leaving the child asleep in his crib with Mr. Lewis watching him. When she returned, she said, Mr. Lewis was acting strangely. She found her child unresponsive in the crib and then saw Mr. Lewis on the phone calling for help.

The Allegheny County medical examiner's office determined Monday that the child died of blunt force trauma to the head.

Mr. Lewis was charged Tuesday after being treated at UPMC McKeesport for an overdose of pills.

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