Interesting bedtime conversation with my daughter

On our recent weekend family getaway, this is what my daughter said to me as I laid her to sleep one night.

My daughter: "Mama, did you know that today the policeman brought my baby brother back to our room?"

Me: "What are you talking about honey?"

My daughter: "Yeah, when daddy brought us back to our hotel, the policeman found (brother) in the hallway, and knocked on our door."

Me to Husband: "Honey, what the heck is she talking about?"

Husband: "NO, it wasn't like that at all...it wasn't a policeman."

Me: "Yeah??"

Husband: "It was just a security guard."