I agree that it takes time. What is frustrating is that Toombs said over 2 months ago that it would take about 2 more weeks. At that time, he knew the volume of images and had presumably been working with the Dallas FBI lab in getting a time estimate.
Imo, there are only 3 reasons why no *advertiser censored* charges have been filed:
1. The *advertiser censored* discovered cannot be conclusively proven to include children; could be "barely legal" or those suspected of being under-aged could be masked or their faces could be obscured (hard to tell age if they are developed teens, like Hailey, for example).
2. The *advertiser censored* discovered can be proven to exclude children.
3. There is more than possession suspected and the child *advertiser censored* case is extensive and involves multiple parties that have to be determined and investigated.
Where is Hailey Darlene Dunn?...
He was refering to the devices siezed form the grandmothers house, not the computer from the mothers house, when he said 2 weeks. That has probably been done by now. Since then he has said that the case is being dealt with in Howard county, since that is where most of the material was found, in other words the material from the original computer 6 months ago.
There is nothing in the information that has been released so far to suggest that it is part of a larger conspiracy...people who are into that have their own computers and free access to the internet, not computers in the control of someone else in another city and no ready access to the internet.
From the search warrant affidavit, the CP was found in the slack space by the FBI, while the 100k+ *advertiser censored* images were found by the local LE computer expert in the regular file system. So the problems they will face are as follows:
(1) SA was mostly using the computer at the GMs house (according to the affidavit, where it was testified that he used that computer all the time, while no such claim was made regarding the mothers computer), and if that wasn't the one the CP was found on, and instead it was found on one he used less frequently, it would imply that someone other than him was responsible. If SA was responsible there would be extensive collections on all the computers he used, not just one and not one that was least accessible to him.
(2) Most family computers don't have individual user logins set up, certainly not on computers owned by people apparently as tech-ignorant as these folk. So, there would be no record of who downloaded the material. At best they might only know when, and since this would allmost certainly have taken place a long time previously, it would be extremely difficult and probably impossible to prove who was where and when at the time.
(3) The amount of illegal material is probably relatively small and it has been deleted. That would mean that the possibility of accidental download cannot be excluded.
(4) We know from the affidavit that a single image from the GMs house was "suspect" because it appeared similar to images from the mothers house. It was not suspect because the person depicted appeared too young, otherwise the attesting officer would have explicitly said so. That would imply that at least some of the apparent CP images from the mothers house are in the close of age range, and may not actually be CP. So, they would have to track down the person in the image to determine how old they are and when the pictures would be taken. Since the vast majority of the "close of age" type of apparent CP comes from Eastern Europe or Russia, where the law regarding that sort of stuff is vague or non-existant, it is going to be tough to prove anything.
So, that is a lot to do to build a case. If the material is marginal, and they cannot be sure who is responsible, I can see the FBI would not be pushing it as a high priority. There is a sea of CP for them to deal with, and in the big picture the resources required might not be worth the outcome. Being a small case on the periphery of a big case does not make the small case a high priority.
Anyway, time will tell.