The alleged murder of a 69-year-old Jesse Miles in Niles Township by 14-year-old Dakotah Eliason -- the grandson of Jesse Miles -- is still a mystery to those who knew the teenager and Niles High School freshman.

Though court documents don’t reveal a motive, they do include a description of how the alleged murder happened, according to testimony Eliason gave police Sunday morning.

Just after 3 a.m. Sunday, police arrived at his grandparents' home in Niles Township.

According to court documents, Dakotah was standing outside with his grandmother. Jesse Miles was “inside on the couch bleeding heavily,” the complaint and warrant sheet reads.

Dakotah told police “he had a lot of pent up emotions.” Before firing the gun at his grandfather’s head, Eliason went to the coat rack by the door and grabbed his grandfather’s gun. “He sat by his grandfather and argued with himself about shooting his grandfather,” the document reads.

Eliason told police he shot his grandfather, then went into his grandmother’s room, put the gun on the floor and confessed.

In an interview with the Niles Daily Star, Dakota’s mother Mary Apfel says she doesn’t know why her son did it.

“We all know he did a bad thing,” Apfel told the paper.

"This is not the loving child both of our families know,” said Apfel.

And at Niles High School, the boy who allegedly murdered his grandfather isn’t the 9th grader students and teachers knew, either.

"We had no problems with him here, he's a good student as far as I am concerned, and his records show, so, this is something that is very much out of the blue,” said Jim Knoll, principal at Niles High School.

Students there are being offered counseling after multiple tragedies over the last month for the community – including an unsolved double homicide in February.

"Our kids are emotionally spent, and our community is pretty beat up over these things,” said Knoll.

14-year-old Dakotah Eliason is being charged as an adult with open murder.

On Tuesday, March 16 Eliason will be in court again. He was arraigned on Monday.