WARSAW, Ind. (WANE) – A judge has sentenced a Warsaw man to 50 years in prison for fatally beating his ex-girlfriend’s 2-year-old daughter and burying her in a shallow grave.

Thirty-year-old Christopher Grimmett of Warsaw learned his sentence Thursday after pleading guilty but mentally ill to murder last month in Kosciusko County.

Police say Grimmett beat Adalin Stamper to death while he was babysitting her and buried her in the backyard of his brother’s house in Warsaw last November.

Christopher A. Grimmett

It was then that police were called to a home at #53 EMS C17 Lane on Big Chapman Lake northeast of Warsaw on report of a missing person. There, Grimmett told investigators he was babysitting his girlfriend’s daughter, young Adalin, earlier in the day but the girl’s maternal grandmother had picked up the child.

Deputies, though, quickly debunked that claim, and began to “back-track” Grimmett’s path that night.

It led officers to Grimmett’s brother’s home at 1835 Sue Ave. on Warsaw’s west side, where police said he’d been earlier in the afternoon with Adalin. There, in the back yard of the home, sheriff’s deputies found a shallow grave where Adalin’s body was uncovered, according to authorities.

According to a probable cause affidavit filed in Kosciusko County Circuit Court, Grimmett said he took a taxi in the evening, and a taxi driver told police he saw blood on Grimmett’s pants.

That report allowed police to secure a search warrant for the Sue Avenue home of Johnny Grimmett. Police said they found “substantial” blood inside the home, and a “suspicious” area in the backyard where leaves were cleared away and what appeared to be fresh dirt.

There, police found Adalin’s body, wrapped in white trash bags, the affidavit said.

In an interview with police, Grimmett admitted he beat Adalin to death with his hands. He then said he buried her in the backyard of the home. An autopsy on young Adalin’s body showed she died of blunt force traumatic injuries, the affidavit said.

In court on Thursday, Kosciusko Circuit Judge Michael Reed, in delivering the sentence, said, “It’s impossible to make sense out of senseless acts.”

The Warsaw Times-Union reports the sentence was included in a plea agreement that Grimmett struck with prosecutors. With credit for good time and for time already served, he could be released in 2050.The Associated Press contributed to this report.