A booking officer at the Glynn County jail said Sunday 17-year-old Tyler Heinze of Brunswick was still in custody.
It wasn't immediately clear whether he had a lawyer
The Florida Times-Union reports that Heinze was arrested Friday and charged with two counts of felony possession of a weapon on school property.
A police report says Heinze had the items at Glynn Academy Wednesday.
School officials suspended Heinze for 10 days and he could be expelled by a disciplinary tribunal.
His brother, Guy Heinze Jr., is awaiting trial in the slaying of their father and seven other people in August 2009.
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