in Re Michael Richard Barrera

TEXAS COURT OF APPEALS, THIRD DISTRICT, AT AUSTIN NO. 03-22-00533-CR In re Michael Richard Barrera FROM THE 26TH DISTRICT COURT OF WILLIAMSON COUNTY NO. 21-1836-K277, THE HONORABLE DONNA GAYLE KING, JUDGE PRESIDING MEMORANDUM OPINION Relator Michael Richard Barrera filed a pro se notice of appeal that we construe as a petition for writ of mandamus, in which he seeks to “appeal” the trial court’s failure to rule on his pro se pretrial application for writ of habeas corpus. See Ex parte Caldwell,

58 S.W.3d 127, 130

(Tex. Crim. App. 2000) (observing that it is substance of filing, not title, that…