He told police there was an intruder in his girlfriend's home. A jury said it was him, and he killed his lover.

A St. Louis man called and told the police his girlfriend texted him an intruder at her home.

But a jury said he was the intruder and killer. He will now be spending the rest of his life in prison.

Last week, Circuit Judge Brian May handed Kevin Fields, 37, a life term without parole for the stabbing death of his girlfriend Tami Allen. Fields was found guilty and convicted by a jury of first-degree murder, armed criminal action, first-degree robbery and second-degree assault.

Around midnight on Feb. 5, 2016, Moline Acres, Missouri, police performed a welfare check at the 9800 Block of Wendell Drive after they received a call from a man who claimed to be Allen’s boyfriend. He said Allen had just texted him that an intruder was at her residence and she could not talk.

When police arrived, there was evidence of a forced entry at the back door of the house. Inside, Allen was found brutally stabbed and inflicted with multiple wounds in her living room. She was transported to a nearby hospital, where she later died.

Despite Field’s claim of an intruder, investigators found his DNA at the crime scene. At the trial, prosecutors submitted pictures of the window the defendant used in gaining access into Allen’s home. In addition, pictures of the gate and fence Field touched as he ran away after stabbing Allen to death was submitted as evidence.

St. Louis County Prosecuting Attorney Wesley Bell highlighted the importance of the case regarding domestic violence awareness.

“We had to go through a lot of challenges to track down witnesses that were not connected to the defendant, which makes it more difficult. This just happens to be on Domestic Violence Awareness Month and it is so important to report on these cases and educate, and not only the public, but victims to let them know they are not alone,” said Bell, according to Fox 2 Now.

Bell said the case was the most upsetting he had dealt with so far in his career.

Family members described the 32-year-old mother of two as a unique individual who cared so much about others. Allen worked as a nurse at a hospice.

"She was a very caring, special, lovely person. No one or nothing can ever replace her," Allen’s uncle said during a victim impact statement at the sentencing hearing, according to 5 On Your Side.

Moline Acres police believed it was the first homicide in their city in 10 years.