In 1989, as fascination with Downey's TV show began to wane, he was involved in an incident in a San Francisco International Airport restroom in which he claimed to have been attacked by neo-Nazis who painted a swastika on his face and attempted to shave his head. Some inconsistencies in Downey's account (e.g., the swastika was painted in reverse, suggesting that Downey had drawn it himself in a mirror), and the failure of the police to find supportive evidence, led many to suspect that the incident was a hoax and a plea for attention.
My guess is that police are questioning her and looking for any inconsistencies in her story.
Again, time will tell if this is for real. It goes without saying that if this is real, the act is despicable...