CROWN POINT | The words "my mommy loves me" embroidered on the shirt 3-month-old Nathan Wisniewski was wearing at the time of his death left behind a tell-tale clue, Lake County Deputy Coroner Jeff Wells said Tuesday.

The words, which could be seen imprinted on the infant's chest 24 hours after his death, led the coroner's office to conclude he had died by intentional suffocation while lying face down in his bassinet.

"We knew we had something more than SIDS. We knew that someone had done this to him intentionally," Wells said.

The baby's mother, Kimberly Ann Kelley, 30, of Hobart, was charged Saturday in Lake County Superior Court with murder, battery and neglect of a dependent.

She is being held without bond at the Lake County Jail, Hobart police Deputy Chief Jeffery White said.

Wisniewski, who was born a month premature on July 28, was pronounced dead at 5:30 p.m. Nov. 13 at St. Mary Medical Center in Hobart.

"With the baby, the first sign was the mother's questionable statement that she had placed him on his back in his bassinet after we found him on his stomach. A baby that age can't roll over with his arms out to his side. That tipped things off," Wells said.

The baby's death was ruled a homicide caused by intentional suffocation, Lake County Coroner David Pastrick said.

Hobart Detective David Grissom said police, who are nearing completion of Wisniewski's death investigation, also are looking into the death of another of Kelley's babies. An infant girl died approximately four years ago in Indianapolis.

"During the investigation, we saw the earlier death as a possible pattern of behavior since both babies were 3 1/2 months old and both were born prematurely," Grissom said.

He said Kelley's baby girl died at Riley Hospital for Children in Indianapolis.

Police have contacted the hospital but were told they would need to obtain a subpoena prior to receiving any medical records, Grissom said.

He said police also intend to contact the Indianapolis Metropolitan Police, which may be the department to pursue the case.

Additional charges, if warranted, could be filed against Kelley if the death investigation of the baby girl leads in that direction, he said.

Indianapolis Metropolitan Police Sgt. Paul Thompson said he would be glad to work with Hobart police if he has reason to believe an investigation is warranted.

Kelley's mother, Portage resident Catherine Johnson, told police her daughter had decided to take her infant daughter off life support because she faced 18 surgeries and likely would not survive.

Kelley also is the mother of a 10-year-old girl who has been living with her biological father, Grissom said.

Grissom said he doesn't know where the daughter lives.