Teen Hugged 14-Year-Old Ex-Girlfriend After Slitting Her Throat, Stabbing Her a Dozen Times Before Fleeing on Scooter

A man allegedly stabbed his 14-year-old girlfriend multiple times at a Minnesota park before slitting her throat, giving her a hug and knifing her one more time in the back.

Isaac Arthur Arndt, 18, is charged with second-degree murder in the death of Jaelyn Walker in Moorhead, which is on the border with North Dakota near Fargo. According to a probable cause statement, Arndt walked into to the Clay County Law Enforcement Center around 11 p.m. Aug. 19 to report an assault. He had two cuts on his fingers. Arndt claimed he and Jaelyn were at Gooseberry Park when an “unknown white male” started following them. He said as he ran away, the man attacked him with a knife, per the affidavit.

Isaac Arndt and Jaelyn Walker

About 90 minutes after Arndt’s statement, Jaelyn’s mother called the Moorhead Police Department to report her missing. A locator on her phone through Snapchat led cops near a bicycle trail on Elm Street and 6th Avenue South. Several officers searched the area where they found Jaelyn’s body in the Red River near a wooded area along the trail. She was suffering from multiple stab wounds. Cops also found a knife and lots of blood.

Moorhead detectives spoke with Arndt at the hospital. Post Miranda, he initially gave them the same story he told the other police officer earlier in the night, but his statements were inconsistent, detectives noted. Arndt eventually admitted that he and Jaelyn had been in a “romantic relationship” for several months but it had recently ended, according to the affidavit. He claimed the two were at the park when Jaelyn wanted to know about his new girlfriend and attacked him when he refused to tell her.

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Arndt spoke with detectives and prosecutors in a second interview. He allegedly said after he stabbed her several times he saw her “laying there suffering.”

“Defendant stated that he then cut her throat, gave her a hug and stabbed her one more time in the back,” the affidavit said.

He allegedly dragged her body to the river and left her there. She was dead, he reportedly admitted.

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