Zapata v. People, 428 P.3d 517

Background

Zapata and Murillo entered a convenience store; Murillo attacked the clerk with a knife, the clerk subdued Murillo with a hammer, and Zapata fled. Zapata was later tried and convicted as a complicitor (attempted second‑degree murder and first‑degree assault).
Murillo suffered brain injury and underwent court-ordered (and later defendant‑requested) competency evaluations; Murillo withdrew incompetency claims, pled guilty to a lesser charge, and testified against Zapata.
Zapata sought Murillo’s competency evaluation reports (arguing they might contain exculpatory/impeachment material); the trial court denied access and refused in camera review, ruling the reports privileged and disclosure limited to Murillo’s case.
The prosecution introduced evidence of Zapata’s prior threats and controlling behavior toward S.M. as res gestae; Zapata objected as prejudicial character evidence.
The court of appeals affirmed; the Colorado Supreme Court granted certiorari to review whether (1) the competency reports had to be disclosed or reviewed in camera and (2) admission of res gestae evidence was reversible error.

Issues

Issue	Plaintiff's Argument (Zapata)	Defendant's/People's Argument	Held
Are competency evaluation reports privileged?	Reports are discoverable under Crim. P.16/statute or otherwise not protected.	Reports are protected by psychologist‑client or physician‑patient privilege.	Held: Competency reports are privileged under the psychologist‑client or physician‑patient statutes.
Does a defendant’s raising competency waive privilege as to third parties (co‑defendant)?	Waiver under §16‑8.5‑104 is broad; Murillo’s waiver (by raising competency) extends to Zapata; prosecution’s access waives confidentiality.	Statutory waiver is limited to the judge, defense counsel, and prosecutor in that defendant’s case; it does not extend to separate criminal defendants.	Held: Statutory waiver is limited to the parties and court in the evaluated defendant’s case; privilege was not waived as to Zapata.
Do Brady/due process or Crim. P.16 require disclosure or in camera review of privileged competency reports when prosecutor has access?	Due process/Brady and Crim. P.16 require disclosure or at least in camera review because reports might contain impeachment/exculpatory material.	Ritchie and Brady require a threshold showing of materiality; speculative assertions insufficient.	Held: No Brady violation—Zapata made only speculative/vague assertions; he did not show the reports likely contained material favorable evidence to justify disclosure or in camera review.
Was admission of prior threatening/controlling conduct (res gestae) reversible error?	Admission was improper character/bad‑acts evidence and unduly prejudicial.	Evidence was res gestae—intertwined with motive and context; even if erroneous, any error was harmless.	Held: Even if erroneous, admission was harmless given strong independent evidence of Zapata’s complicity; convictions affirmed.

Key Cases Cited

Cooper v. Oklahoma, 517 U.S. 348 (U.S. 1996) (incompetency trial protections; unconstitutional to try incompetent defendants)
Brady v. Maryland, 373 U.S. 83 (U.S. 1963) (prosecution must disclose favorable, material evidence)
Pennsylvania v. Ritchie, 480 U.S. 39 (U.S. 1987) (in camera review for privileged state records may be required under Brady if defendant makes a sufficient showing)
United States v. Bagley, 473 U.S. 667 (U.S. 1985) (impeachment evidence falls within Brady)
Giglio v. United States, 405 U.S. 150 (U.S. 1972) (government must disclose deals and impeachment evidence affecting witness credibility)
Clark v. Dist. Court, 668 P.2d 3 (Colo. 1983) (physician/psychologist privileges bar testimonial disclosure and pretrial discovery)
People v. Sisneros, 55 P.3d 797 (Colo. 2002) (psychologist‑patient privilege protects treatment files and records)
Martinez v. Lewis, 969 P.2d 213 (Colo. 1998) (factors for determining existence of physician‑patient relationship in nontraditional contexts)