<human>: I'm at the hangout music fest in Alabama. My brother in law is an African American while we are all white. Upon entering the security searches him and clears him but the police officers surround him and ask him to step aside. My brother asked what was wrong and the officer said "we need to search you again". Upon hearing that I pull out my phone and start recording it. My brother asked if he was being detained, the officer said no but still requested a search. My brother said he had nothing to hide and was refusing the search. The officer replied that he could arrest him from" obstruction of justice". While this is all going on I have a police officer come to me and say I'm not allowed to record. I keep recording and say that it is legal to document and film any actions while in public. He said this festival was a "closed event" due to "the public having to pay". I dont know law well enough to argue, so I sumbitted to the officer and so did my brother. Is what happened legal? And if not, what could we have done differently. We did also get this officers name and badge number. Thanks

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: brother gets pulled to the side after a security check. Stating his rights, the officer said he would arrest him for " obstruction of justice".