Given that the @LAPDMPU only has 154 tweets, and presumably about half of those are located tweets, it's hard to say how unusual the involvement of RHD is. With that said, Heidi's case is the first out of ~80 where they're the point of contact.
To put it another way, she's the first missing person in the 6 months of the account's existence to have RHD as a point of contact.
To put it another way, she's the first missing person in the 6 months of the account's existence to have RHD as a point of contact.