It could be several weeks before investigators determine what killed a popular Henry County teenager.

An autopsy conducted Monday on Jason Tyler Holland, 15, was inconclusive, Donald Cleveland, Henry County coroner, told the Atlanta Journal-Constitution. Toxicology tests will be conducted, but the results could take up to three months, Cleveland said.

Holland, a sophomore at Ola High School in McDonough, died Friday afternoon after a brief hospitalization, according to school officials. A junior varsity football player who wore No. 77, Holland fell ill several hours after practice Wednesday and was taken to a local hospital before being transferred to Children's Healthcare of Atlanta.

The school system and Holland's family have said the teen's death was not related to football. Holland was very athletic and a straight A student, his family said in his online obituary.

Visitation for Holland will be Tuesday from 4 to 8 p.m. at Haisten Funeral Home in McDonough. The funeral is scheduled for Wednesday at 11 a.m. at the funeral home.

A fund has been established at Heritage Bank to assist Holland's family with medical and funeral expenses, the school announced on its Facebook page Monday. The school is also accepting donations and will be selling T-shirts and wrist bands to raise money for the family.