Rider farted in the car

Had two separate Uber Pool riders in the car. One of them silently farted with an extremely heavy smell and another one rolled down the window. I couldn’t tell which one of them did it. Later on, when I dropped’em off I got a message from Uber than one of the riders reported that my car smells (she probably thought I’m the one who farted). Should I message Uber back and tell’em that it was the second rider that farted and I couldn’t do anything with this situation?