Tex. Local Government Code § 161.168

(a) The commission shall keep an information file about each sworn or other complaint filed with the commission. The file must include:

(1) the name of the person who filed the complaint;

(2) the date the complaint is received by the commission;

(3) the subject matter of the complaint;

(4) the name of each person contacted in relation to the complaint;

(5) a summary of the results of the review or investigation of the complaint; and

(6) an explanation of the reason the file was closed, if the commission closed the file without taking action other than to investigate the complaint.

(b) The commission shall provide to the person filing the complaint and to each person who is a subject of the complaint a copy of the commission's policies and procedures relating to complaint investigation and resolution.

(c) In addition to the notice required by Sections 161.156 and 161.167, the commission, at least quarterly until final disposition of a complaint, shall notify the person who filed the complaint and each person who is a subject of the complaint of the status of the sworn complaint.

(d) The commission shall resolve a complaint within three months of its receipt unless it makes a determination that additional time is required to resolve the matter. On a determination that additional time is required, the commission may extend the investigation in three-month increments. Each extension requires separate approval by the commission.

(e) If the commission does not resolve the matter within three months or within an authorized extension, the complaint shall be deemed to have been dismissed without prejudice.