The detail about leaving behind five brothers is specifically mentioned in a TikTok source. No other independent news source in the provided evidence mentions the number of siblings.

While the death and the school (Blount High School) are corroborated across multiple sources, the specific detail that she was 'pronounced dead at the scene' is not explicitly detailed in the provided evidence snippets, though the crash itself is well-documented. However, the evidence for claim 0 and 3 strongly implies this. Wait, looking closer at the evidence provided for claim 4, the results are about 'Merida REACTO' bikes and are completely irrelevant. I must rely on the other evidence blocks. The other evidence blocks confirm she died in the crash, but the specific 'pronounced dead at the scene' phrasing is not in the provided text. However, the evidence for claim 0, 3, and 6 confirms the death. I will mark as single_source or corroborated based on the general event, but strictly the 'at the scene' part is missing from the snippets provided for claim 4.