Badgerow died Dec. 9 after he was shot once in the chest with a semi-automatic pistol at his rural Kingsley home, according to Plymouth County Sheriff Mike Van Otterloo.
Badgerow's stepbrother, William "Billy" Noll, 41598 310 St., Kingsley, has been ordered by a judge to be detained at the Cherokee juvenile detention center, the Youth Emergency Services (YES) Center, said Van Otterloo at the news conference Friday.
Noll was arrested Thursday at the home of his father, Kenneth Noll, in Royal, and was charged with willful injury and involuntary manslaughter.
According to the sheriff's information, the involuntary manslaughter charge relates to unlawfully and unintentionally causing the death of Badgerow and the willful injury charge relates to pointing a loaded firearm at Badgerow which caused serious injury.
The charges are felonies.
The shooting occurred at the home of Tim and Marriel Badgerow, where both Noll and his 17-year-old stepbrother lived.
Marriel Badgerow is Noll's mother, Tim Badgerow is Kyle Badgerow's father and Marriel and Tim are husband and wife, the sheriff said.
The names of two others in the residence when the shooting occurred are not being released, Van Otterloo said.
"First of all, they're minors, and secondly, we believe by releasing the names of these individuals, it might cause some interference with the rest of our investigation," he explained.
The sheriff said the shooting occurred inside the residence.
"There was some speculation and a lot of rumors about the shooting being outside the residence and that some other circumstances might have contributed to the death, but it did happen in the residence," Van Otterloo said.
The gun used in the shooting was a semi-automatic pistol which was fired once. It was found in the home when the sheriff's department responded to a 911 call at 5:23 p.m. Dec. 9, he said.
At the news conference, a reporter asked the sheriff to discuss what led up to the shooting and whether there was an argument or if the gun was being examined and "went off."
Van Otterloo said he was not going to say a lot about the circumstances leading up to the shooting.
"To say that it (the gun) accidentally went off is probably not a correct statement -- I think that's shown by the charges that have been filed," Van Otterloo said.
His department is working with the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) to determine who owns the gun used in the shooting and other guns in the home.
Asked if there was any possibility of negligence with the pistol being accessible, the sheriff said the investigation was continuing and additional charges may be filed.
He declined to offer specifics, stating that might jeopardize the investigation.
As part of the work leading up to the charges, search warrants were executed at the residence where the shooting occurred, at K-P Middle School in Pierson and at Kenneth Noll's residence.
Investigators are not specifically asking the public for information in an investigation, the sheriff said.
"Obviously, if anyone feels they have information that might be helpful to us, any kind of background about Kyle, Billy or any family members, give us a call and we can determine whether it needs to be pursued," he said.
The Plymouth County attorney and medical examiner's offices, Kingsley Police and Iowa Department of Human Services staff have assisted in the investigation, he said.
Van Otterloo described the shooting death as a case his office has been saddened by.
"Whenever we have a death situation that involves teenagers it is certainly a sad situation for law enforcement, for the public and obviously for the families that have been involved," he said.
He acknowledged some earlier deaths of students at K-P.
"The students have lost some classmates and for such a small community that's very difficult," Van Otterloo said. "The kids are close to each other and so Kyle's friends are probably some of the family friends of Billy."
The sheriff saw an outpouring of support in the community when he attended Kyle's funeral at the K-P school, he said.
Van Otterloo also talked about the school staff at the news conference.
"We've been trying to keep them informed -- they need to know what's going on so they can best run their school and their classrooms," he said.