*WARNING: This story contains details not suitable for all readers.*

AUBURN, Ind. (WANE) – Court documents reveal how a 22-year-old, charged with murder in the death of an Auburn woman, allegedly killed his girlfriend.

A 25-year-old mother identified as Hannah Fields was found dead in her apartment on March 30.

Her then-boyfriend, Matthew Urzua, was charged with murder the same day.

In DeKalb Superior Court documents, investigators detail what led to her death.

Just over a week before the killing, the Auburn Police Department was called to the apartment for a domestic situation on March 21. Police talked with Fields and Urzua, who both said they’d been arguing all day, according to court documents. No arrests were made, and Fields went to stay elsewhere with family.

According to court documents, a family member told police they had seen injuries on Fields’ neck after fighting with Urzua in the past, and the family member had previously confronted Urzua, telling him not to touch her when he’s angry with her.

But around 3:30 a.m. on the day of Fields’ death, DeKalb County sheriff’s officers found a car in a ditch near CR 46A and CR 39, with Urzua slumped over the driver’s seat.

The car was owned by Fields, police learned.

Urzua told officers he had taken a large amount of trazodone – an antidepressant – that also belonged to Fields “because he wanted to ‘hurt’ himself,” according to court documents. He said “‘something happened’ which caused him to become suicidal,” police recalled in court documents.

“I believe this is a tacit admission to Urzua’s sense of guilt from killing his girlfriend,” a detective wrote in court documents.

Police described Urzua in court documents as appearing lethargic and tired during that conversation. Body camera footage showed that, when officers offered to contact Fields, he looked over to the passenger seat as he declined.

Fields’ phone was on the seat, police discovered during the search warrant that followed.

Nine hours after Urzua was found in the ditch, Auburn police went to a welfare check in the 900 block of Griswold Court – where Urzua and Fields lived – at 12:30 p.m. The person who called police said they hadn’t heard from Fields since the day before, according to court documents.

In the apartment, police found a woman identified as Fields. A pillow was covering her face where she lay next to the bed.

She was pronounced dead at the scene.

A neighbor told investigators they had heard commotion nearby around 10:30 p.m., but they weren’t sure which apartment the noise was coming from.

According to court documents, a family member of Fields told police that just before 3 a.m., Urzua had sent screenshots of messages alluding to the fact that Urzua suspected Fields was cheating on him.

That evening, Urzua was arrested for the murder of his girlfriend.

“At no point did Urzua show any sign of emotion nor did he ask why he was being arrested,” police said in court documents.

On April 2, the autopsy report revealed various injuries on Fields’ head and neck. She was strangled and suffocated, the autopsy determined, and her death was ruled a homicide.

Urzua pleaded not guilty in Thursday’s initial hearing

Urzua is being held in the DeKalb County Jail without bond. A pretrial conference in the case is set for May 28.