A man accused of killing a 2-year-old girl will plead guilty but mentally ill to murder, according to documents filed this morning.

Christopher Grimmett, 30, Warsaw, was scheduled to face a jury trial in October.

Judge Michael Reed set sentencing for Monday in Kosciusko Circuit Court.

Under the plea agreement, Grimmett will serve 50 years in the Indiana Department of  Corrections.

The body of Adalin Stamper was found early Nov. 11 buried in the back yard at 1835 Sue Ave., Warsaw.

Kosciusko County Sheriff’s Department deputies had been searching for Adalin since the day before she was found. The girl’s mother, Katie Stamper, had reported Adalin missing from her residence on Chapman Lake.

Katie had left Adalin with Grimmett, her then-boyfriend. Grimmett took the girl to his brother’s home on Sue Avenue to do laundry.

Officers met with Grimmett, who told them he had left the toddler with her maternal grandmother. Officers determined this was false by contacting the taxi driver that took Grimmett home. The driver told police he remembered seeing blood on Grimmett’s pants, according to court records.

Once inside the Sue Avenue residence, officers found a substantial amount of blood, an affidavit states.

Police say Grimmett confessed to killing Adalin and burying her in the back yard.

Kosciusko County Coroner’s Office determined the girl died from multiple blunt force trauma injuries.

No motive has been released by law enforcement.

Grimmett has been held in the Kosciusko County Jail without bond since his arrest.