Stiles reportedly intercepted a pass, walked to the sidelines and collapsed shortly after the play, according to NBC Action News. He was pronounced dead on Friday, at approximately 4 a.m., hours after arriving at University of Kansas hospital in Kansas City by helicopter.
A report on Yahoo!'s Prep Rally blog notes that Spring Hill Coach Anthony Orrick told the Miami County Republic that Stiles complained of head pain before collapsing.
"It was just a routine play. I don't think there was anything special," Orrick told the Miami County Republic after the game. "I think he just hit the ground pretty hard with his head. He came on the sideline and told one of my assistants, 'my head is really hurting.' He sat down on the bench. He then stood up, but his legs went underneath him and collapsed there."
NBC Action News also reports that Stiles was taking part in his first game since returning from a concussion suffered in early October. Stiles' father confirmed this to the Kansas City Star, noting that his son suffered a concussion during the homecoming game earlier in the month, but was cleared to play Thursday.
Multiple outlets are also reporting that the tackle was 'normal,' but Stiles did hit the ground hard.
Grief counselors have been on hand for students of the Spring Hill school district. KCTV5 in Kansas City described Stiles as very popular and noted, "He had a 4.0 GPA -- didn't drink or do drugs -- and was one of the school's best athletes."