him. It was discovered that the weapon was a screwdriver.
The only question before the trial court in the summary judgment proceedings was whether the officer was entitled to qualified immunity, which is a question of law. Qualified immunity is a recognized defense to actions against law enforcement officers and their government employers. See Tex. Crv.PRAC. & Rem.Code Ann. § 51.014(5) (Vernon Supp.1992).
A police officer is entitled to qualified immunity if he is acting in good faith within the course and scope of his authority, and performing discretionary functions. Bozeman v. Trevino, 804 S.W.2d 341, 343 (Tex.App.—San Antonio 1991, no writ). Vasquez must establish these elements by summary judgment evidence.
The burden of demonstrating lack of a genuine issue of material fact is upon the movant, and all doubts are resolved against the movant. City of Houston v. Clear Creek Basin Authority, 589 S.W.2d 671, 678-79 (Tex.1979). A defendant may move for summary judgment based on an affirmative defense. It is the defendant’s burden to prove conclusively all elements of the affirmative defense as a matter of law such that there is no genuine issue of material fact. Montgomery v. Kennedy, 669 S.W.2d 309, 310-11 (Tex.1984). The movant defendant must come forward with summary judgment evidence with respect to each element of the affirmative defense. Nichols v. Smith, 507 S.W.2d 518, 520 (Tex.1974). When a defendant moves for summary judgment on the basis of his affirmative defense, he must, therefore, conclusively prove all essential elements of that defense. Swilley v. Hughes, 488 S.W.2d 64, 67 (Tex.1972).
In City of Houston v. Clear Creek Basin Authority, the supreme court recognized that section (c) of 166a requires the non-movant to define specifically in writing the controverted issues and defects in the movant’s proof that would defeat the motion. 589 S.W.2d at 677. Therefore, if the movant in the present case established the qualified immunity defense, the non-movants were required to controvert this by summary judgment evidence. Once the movant has established the right to a summary judgment on the issues presented, the non-movant’s response should present to the trial court a genuine issue of material fact that would preclude summary judgment. Wheeler v. Aldama-Luebbert, 707 S.W.2d 213, 215 (Tex.App.—Houston [1st Dist.] 1986, no writ). However, the non-movants may not urge on appeal a defense to the qualified immunity defense which was not expressly presented in writing to the trial court.
Discretionary actions are those which require personal deliberation, decision, and judgment, while ministerial actions require obedience to orders or performance of a duty as to which the actor is left no choice. Wyse v. Department of Public Safety, 733 S.W.2d 224, 227 (Tex.App.—Waco 1986, writ ref’d n.r.e.); Esparza v. Diaz, 802 S.W.2d 772, 779 (Tex.App.—Houston [14th Dist.] 1990, no writ).
Appellees contend in the written response that since the officer was not making policy he was not acting in a discretionary capacity and cannot be immune. This argument is misplaced as a response to the motion for summary judgment based on qualified immunity of the police officer. In addition, questions of the officer’s individual negligence, raised by appellees, are immaterial when deciding whether the officer was performing discretionary functions. Carpenter v. Barner, 797 S.W.2d 99, 101 (Tex.App.—Waco 1990, writ denied). Therefore, immunity of the officer may exist even when he has acted negligently.
The Summary Judgment Evidence
Ronald H. Rogers, authenticated by summary judgment proof as a law enforcement expert in Texas, stated his opinion based on his study of the police reports, internal affairs department reports, other case documents, and after conferring with Vasquez regarding the events. His opinion was that Vasquez acted within the acceptable, reasonable and lawful parameters of proper police training and conduct. Further, he stated that Vasquez’