MINNEAPOLIS — A 19-year-old Minnesota man changed his mind during trial on Wednesday and decided to plead guilty to killing a friend’s grandmother.

Testimony in the trial of Brok Junkermeier was set to resume Wednesday afternoon, but instead he ended up pleading guilty to first-degree, premeditated murder.

The Kandiyohi County jury on Tuesday and Wednesday watched Junkermeier’s taped confession to killing 79-year-old church volunteer Lila Warwick after forcing her to write him a check for $1,500 last July near Willmar.

Jurors saw Junkermeier use his own body to show where he stabbed Warwick “six, seven times” after choking her and breaking her neck.

“One, two, three, four,” Junkermeier said, hitting points on his chest and abdomen.

Junkermeier said he was pleading guilty to keep “the families from having to listen to more of the evidence.”

“You don’t want anybody to have to hear anymore,” his attorney Kent Marshall said.

“No, I don’t,” Junkermeier said.

When asked with what crimes he ought to be charged, Junkermeier didn’t hesitate.

“First-degree murder,” he said. “I’d say premeditated murder. Accessory to murder also.”

He’s accused of carrying out the crime with Warwick’s grandson, Robert Warwick, now 18. Robert Warwick’s trial is not yet scheduled.