Is caught redheaded a derogatory term?

The phrase "caught red-handed" is the correct expression, meaning to be caught in the act of committing a crime or wrongdoing. However, "redheaded" is not a common term and may not have a widely recognized meaning, but some people might find it derogatory if used to stereotype or insult individuals with red hair. It's important to be mindful of context and intent when using such terms.