State v. Tyus, 184 Conn. App. 669

December 22–23, 2006: victim Todd Thomas was shot and killed outside Ernie’s Café in New London; a single 9mm cartridge casing at that scene matched five 9mm casings from a December 3 shooting involving the defendant.
Defendant Gerjuan Tyus and codefendant Darius Armadore were arrested in 2012 and charged with murder and conspiracy; conspiracy counts later dismissed as time‑barred.
Cell‑phone tower records placed phones used by Tyus and Armadore near Ernie’s shortly before the shooting and later at a Norwich nightclub where both were found together; each testified the other was with him that night (alibi for one another).
Armadore told his girlfriend, Ritchae Ebrahimi, after the incident that he had shot someone; the state sought to introduce her testimony about that admission in the joint trial.
Firearms examiner Gerald Petillo (primary examiner) died before trial; state’s firearms technical reviewer James Stephenson examined the cartridge casings himself, testified to his independent conclusions, and was cross‑examined at trial.
Trial court granted joinder, admitted Stephenson’s testimony, declined the defendant’s requested limiting instruction on firearms identification; jury convicted Tyus of murder and sentenced him to 55 years; this appeal followed.

Issue	Plaintiff's Argument (State)	Defendant's Argument (Tyus)	Held
Joinder of cases for joint trial	Judicial economy; most evidence and witnesses would be identical and defenses not antagonistic	Prejudiced because Ebrahimi’s testimony (Armadore’s admission) would be admissible against Armadore but not against Tyus absent a conspiracy charge	Affirmed — joinder proper: same incident, non‑antagonistic defenses, and coconspirator exception can apply even without a formal conspiracy charge
Admissibility of firearms testimony under Confrontation Clause	Stephenson conducted his own independent re‑examination and reached his own conclusions; he was available for cross‑examination	Testimony was based on deceased examiner Petillo’s findings (testimonial hearsay), violating confrontation rights	Affirmed — no violation: Stephenson performed an independent exam, did not merely repeat Petillo’s report, and was cross‑examined
Request for limiting jury instruction on firearms ID	General expert‑testimony instruction sufficient to guide jury on weight/credibility	Requested specific cautionary instruction that firearms ID is not scientifically definitive to prevent undue weight on expert opinion	Affirmed — trial court’s expert testimony instruction was substantially similar and adequate; no reversible error

Crawford v. Washington, 541 U.S. 36 (2004) (testimonial hearsay inadmissible unless witness unavailable and defendant had prior opportunity for cross‑examination)
Melendez‑Diaz v. Massachusetts, 557 U.S. 305 (2009) (forensic certificates are testimonial; admission without opportunity to cross‑examine violates confrontation clause)
Bullcoming v. New Mexico, 564 U.S. 647 (2011) (prosecution may not introduce a forensic report through testimony of a surrogate who did not perform or observe the test)
State v. LaFleur, 307 Conn. 115 (2012) (discussing joinder efficiency and standards for joint trials)
Cooke v. Weed, 90 Conn. 544 (1916) (coconspirator statement exception applies in civil and criminal cases even without formal charge of conspiracy)