Unreported / Non-Citable
Background
On February 9, 2022, Kirk Glenn Reiber entered a mobile truck repair shop and asked the owner to fix his bicycle tire. When the owner refused, Reiber left and returned thirty minutes later demanding service. The owner told him to leave. Later that evening, the owner discovered his service truck missing.
The next day, Reiber returned driving the stolen truck. After the owner confronted him, Reiber exited the vehicle laughing. Reiber then approached a customer’s car hauler parked at the shop, falsely claiming he worked there and was wearing what appeared to be a service shirt. When the customer’s son and others tried to prevent Reiber from taking the truck, Reiber put it in reverse, accelerated at high speed, and struck the owner’s wife with the open door, dragging her several feet and causing a concussion and hip injury. A struggle ensued before police arrived.
Reiber was convicted of two counts of unauthorized use of a vehicle and one count of aggravated assault with a deadly weapon. He raised an insanity defense, claiming he did not know his conduct was wrong due to severe mental disease or defect. The jury rejected this defense, and the trial court sentenced him to twenty years for each vehicle theft and life imprisonment for the assault.
The Court’s Holding
The Texas Court of Appeals affirmed Reiber’s convictions, rejecting both his legal and factual sufficiency challenges to the jury’s rejection of his insanity defense. The court emphasized that although Reiber presented uncontradicted expert testimony from a psychologist diagnosing him with depressive disorder with psychotic features and opining that he did not understand his conduct was wrong, expert medical testimony does not establish insanity as a matter of law. The jury may reject such expert opinion and weigh it against lay testimony and circumstantial evidence.
The court found sufficient evidence supporting the jury’s verdict. Reiber’s attempt to flee when law enforcement was called suggested awareness of illegal conduct. His apparent effort to pry open the service truck’s back doors indicated he knew he lacked permission to use it. Most significantly, Reiber’s impersonation of a shop worker to gain access to the car hauler appeared to be an intentionally deceitful ploy rather than the result of confusion or delusion. The jury also could reasonably credit the responding officer’s observations—made in real time at the scene—that Reiber appeared sarcastic and nonchalant rather than confused, over the expert’s evaluation conducted more than a year later.
Key Takeaways
- Uncontradicted expert testimony on insanity does not bind the jury and does not establish insanity as a matter of law
- Insanity is not a purely medical question; it invokes legal and ethical considerations that only the jury can resolve
- The defendant bears the burden of proving insanity by a preponderance of the evidence; the State need not present direct rebuttal evidence
- Evidence of flight when law enforcement is contacted, attempts at forced entry, and deceptive impersonation may support a finding that the defendant knew his conduct was illegal
Why It Matters
This decision reinforces Texas law on the insanity defense, clarifying that expert psychological testimony—even when uncontradicted—remains subject to jury evaluation and is not dispositive of the legal question of insanity. Juries retain the authority to assess credibility, weigh competing evidence, and determine whether a defendant satisfies the legal standard, which turns on whether the defendant knew his conduct was wrong due to severe mental disease or defect.
The ruling also illustrates how circumstantial evidence can undermine an insanity defense. Behavioral indicators such as attempting to flee from police, using deception to gain access to vehicles, and making forced entry into property can demonstrate consciousness of guilt and awareness of illegality, even when psychiatric evidence suggests significant mental health issues. Trial courts and prosecutors should note that conduct at the scene, as observed by law enforcement, may carry substantial weight with juries evaluating the credibility of expert testimony offered months or years later.