[Wa] As an American citizen born in the United States but parents from Mexico, what are my rights when someone tries to detain me for looking the way I look?

As the title says, I was born here in the US, my parents are both American citizens and just yesterday someone in the same situation was boxed in at a local Walmart parking lot by someone from immigration and was detained until they confirmed he was a natural born citizen. What are my rights if someone tries to detain me for looking like I'm from outside the US?