The Dallas Court of Appeals recently reaffirmed that mandamus is controlled by equitable principles, including laches. Here, the relator waited almost nine months to file its petition without explanation. The Court relied on cases finding waiver in which the petitioner waited four to six months before filing for no apparent reason. Accordingly the Court found

As most appellate lawyers around Dallas know, the Fifth Court of Appeals has a reputation (well-earned) for disposing of petitions for mandamus in, let’s say, a summary fashion. Specifically, the mandamus denials, with few exceptions, have consisted of three-sentences memorandum opinions, two of which were reserved for the standard introduction ("The facts are well known