Authorities in Minnesota say a man was arrested on suspicion of murdering his wife last week and reportedly confessed to the fatal shooting in an interview with police.

According to KSTP, 46-year-old Matthew Lynn Jansen was charged with murder in the second degree at an appearance in an Anoka County court on Monday, three days after his wife was found dead.

Police reports indicate Matthew and and Mary Jo Jansen, also 46, were in the midst of a divorce, which investigators say he referenced in his conversations with them.

The two had been married for 23 years and had two children, according to KTRK.

“I can’t believe I did it,” he allegedly said at one point.

He is also accused of telling cops that he assumed this means he doesn’t “have to worry about a divorce now.”

Blaine police officers arrived at the scene on Friday night after receiving a call from a man reporting that he had fatally shot his wife.

Upon their arrival, police ordered him to drop his weapon and leave the residence. Officers then searched the home and reported finding an unloaded firearm on the staircase, the victim’s remains in a bedroom, and two spent rounds near her body.

Among the evidence collected at the scene was a receipt police say documented the recent purchase of a Smith and Wesson .44 handgun matching the type found on the stairs.

An autopsy revealed Mary Jo Jansen died as a result of a homicide by means of gunshot wounds to her chest and neck.

Police reportedly learned from family interviews that Mary Jo Jansen had filed for divorce last year and was planning to move out of the home they continued to share on the day after her death.

[Featured image: Matthew Lynn Jansen, Anoka County Jail]