Kelsey Simmons was arrested earlier this week in Montana, where local police assisted the U.S. Marshals Service in taking him into custody, according to the Monee Police Department. An arrest warrant had been issued earlier this month. He now faces three counts of homicide in connection with the death of his son, Sevyn Simmons, and the Will County State's Attorney's Office has filed a motion seeking to deny him pretrial release while he awaits extradition to Illinois.

The case dates to the morning of Aug. 31, 2022, when paramedics were called at about 8:52 a.m. to the parking lot of the Petro truck stop on Monee-Manhattan Road for a report of an infant boy who was not breathing and was unresponsive. Firefighters were able to resuscitate the 2-month-old, and he was taken to Comer Children's Hospital in Chicago, where he died several days later.

At the time, both parents told investigators the child had not been sick and said they were unsure what had happened before he stopped breathing, authorities said. The family, who lived in Milwaukee, had been driving a semi-truck and stopped for the night in Monee, according to police.

The Cook County Medical Examiner's Office later determined the cause of death was a traumatic head injury, a finding that shifted the investigation toward a criminal inquiry. Police have not released additional details about what led to the indictment or the arrest.

The charges arrive more than three years after the child's death, a reminder of how long some investigations into the deaths of young children can take before prosecutors conclude they have enough evidence to act. For Monee, a small village along the Will County trucking corridor, the case has lingered since the initial emergency call drew first responders to one of the area's busiest commercial stops.

Simmons remains in custody in Montana. It was not immediately clear when he would appear in an Illinois courtroom, and no further information about the circumstances of the case was available.