## Facts

- Will Barnes, a recent detective-school graduate, learned of a plan to rob Thompson, who regularly withdrew cash from a bank to pay farm workers.
- Barnes reported the plan to police officers and some private citizens and claimed he intended to accompany the robbers only to obtain evidence and assist arrests.
- Barnes traveled with the group to intercept Thompson after a bank visit.
- During the robbery, Barnes carried a pistol and, at a robber’s request, cut wires on Thompson’s car to prevent pursuit.
- After the robbery, Barnes claimed he promptly reported events to law enforcement and cooperated in efforts to capture the robbers; he was nevertheless arrested and charged as an accomplice.
- Barnes was convicted of robbery in a Dallas County criminal district court and sentenced to 25 years.

## Issues

1. Whether a defendant may be convicted of robbery as a participant when evidence supports that his involvement was feigned and undertaken in good faith to aid law enforcement, negating criminal intent.
2. Whether the trial court reversibly erred by refusing a jury instruction submitting the defendant’s defensive theory that he lacked intent because he accompanied the robbers to detect and report the crime with law enforcement’s knowledge.

## Decision

- The Texas Court of Criminal Appeals reversed the conviction and remanded.
- The court concluded the record strongly supported Barnes’s claim that he acted as a would-be detective with law enforcement awareness and lacked intent to commit robbery.
- The trial court’s charge was erroneous because it permitted conviction based on accompanying and assisting the robbers without adequately requiring the jury to consider intent in light of the defensive theory.
- Refusal to instruct the jury to acquit (or to apply reasonable doubt) if it believed Barnes acted only to detect and expose the offense was reversible error.

## Legal Principles

- Robbery liability requires proof of criminal intent; outward acts that appear to assist a robbery do not establish guilt if the defendant’s participation was feigned in good faith to aid detection and apprehension.
- When evidence raises a defensive theory that, if believed, negates an element of the offense (including mens rea), the defendant is entitled to a jury instruction that fairly presents that theory.
- A jury charge that authorizes conviction on mere assistance or presence, without properly submitting the intent question where intent is contested by a supported defense, constitutes reversible error.

## Conclusion

The court held that apparent assistance in a robbery is not enough for conviction when evidence supports that the defendant acted in good faith to help law enforcement and lacked criminal intent, and it reversed because the jury was not properly instructed on that defense.


Barnes v. State, 272 S.W. 188 (Tex. Crim. App. 1925)