Can my school search me?

Question Details: My second period class was over and I went to the bathroom before my next class. The bathroom smelt like weed when I got in there and when I left the assistant principal saw me. He then pulled me out of class a couple of minutes later even though he didn't see me smoking or anything in the bathroom, which I wasn't anyway. I was searched by one of the school's administration workers but I asked them before they searched me how they where allowed to do that and they said the smell of weed gave them suspicion to search my backpack. However, I didn't smell like weed at all and neither did my backpack; it was just the bathroom. So I'm just confused on how they were allowed to search me. I just want to know if I could fight it in court and have a chance of winning. This will be my second MIP and I don't think it was fair how I was searched. I looked up state laws for searching students and it said that they aren't allowed to search over a hunch and that's what I feel like they did.

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