After reading the article I can get a better understanding of why it was closed down. Part of me still thinks there could be another reason for it to be closed down. Another part can understand the creators reasoning.
As SouthAussie mentioned a lot of nasty stuff happens on these kind of groups. I have been a member from the start of another case‘s FB group, the case is of 4 murdered college students in the USA, and let me tell ya, that page is crazy! Proper wild! Ive Talked to one of the creators and the amount of time she and the other creator have to dedicate to the page is unreal. The page had at one point over 250k members, a little more than 20k but still, The time and dedication to properly run and administrate a group like this can be full on. I can understand the want and desire to delete the group, esp if it was literally only created to better organise volunteer searches, and it somehow morphs and manifests into this whole other beast.