I'm more familiar with Georgia laws, but you don't have to provide the information requested within the time limit, you just have to respond (of course, there has to be a reasonable excuse why you can't provide within the three days). Further, in Georgia any "ongoing criminal investigation" is almost completely exempt from open records laws, so Earle might be able to exempt these records (or try) on that ground. But I don't know Texas open records laws.
Just for an FYI, you don't have to read all this.
http://www.oag.state.tx.us/opinopen/og_faqs.shtml#pia
What procedures must be followed if a governmental body wishes to withhold information?
Within ten business days of receiving a written request, the governmental body must:
* write the Attorney General, asking for a decision and state which exceptions apply to the requested information;
* provide the requestor with a written statement that the governmental body wishes to withhold the information and that it has asked the Attorney General for a decision;
* provide the requestor with a copy of the governmental body's correspondence to the Attorney General; and
* make a good faith attempt to notify, in the form prescribed by the Attorney General, any affected third parties of the request.
Within fifteen business days of receiving your request, the governmental body must:
* write the Attorney General and explain how the claimed exceptions apply;
* provide a copy of your written request to the Attorney General;
* provide a signed statement to the Attorney General stating the date the request was received by the governmental body or provide evidence sufficient to establish the date the request was received; and
* provide copies of the documents requested or a representative sample of the documents to the Attorney General and the documents must be labeled to show which exceptions apply to which parts of the documents.