Harrell E. Hagans, Brion X. Arrington, Warren N. Allen and Gary A. Leaks v. United States, 96 A.3d 1

Appellants Hagans, Arrington, Allen, and Leaks were charged in a lengthy joint trial for conspiring to assault and kill Mahdi gang members and for multiple murders connected to that feud.
Trial evidence centered on the Delafield vs. Mahdi gang feud, with numerous cooperating witnesses from both gangs detailing shootings and retaliatory violence between 1999 and 2000.
Key incidents included the Tabron shooting (1999), the Nelson shooting (2000), the Webb murder (2000), and the Hernandez murder plus Flores-Bonilla shooting (May 17, 2000).
The government introduced redacted Mahdi brothers’ guilty-plea proffers as statements against penal interest, which later the court acknowledged violated the Sixth Amendment’s Confrontation Clause.
Evidence also included extrajudicial statements by non-testifying co-defendants, testimony about a Roxboro Place shooting to prove weapon possession, and joinder of indictments for joint trial.
The trial court admitted the Roxboro Place evidence under a limited purpose and instructed the jury accordingly; defense motions for severance were denied.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Confrontation Clause error from Mahdi proffers	Proffers admissible as non-testimonial.	Proffers violated Crawford and Akins by admitting co-conspirator evidence.	Harmless beyond a reasonable doubt; no reasonable possibility of contributing to the verdict.
Vicarious liability and co-defendant hearsay (Akins rule)	Party-opponent statements are admissible with limiting instruction.	Pinkerton v. United States instruction allows prejudice against non-declarant co-defendants.	Plain-error claim rejected; no reversible prejudice under Akins framework.
Redaction of Leaks' statement (Bruton issue) in McCoy testimony	Redacted statement should be admissible with limiting instruction.	Redaction that reveals co-defendants’ identities impermissibly incriminates others.	Redaction was improper; however, the error was harmless in light of other evidence.
Admissibility of Roxboro Place shooting evidence	Evidence supports Arrington’s firearm possession and links to charged shootings.	Evidence risks improper propensity inference.	Court did not abuse its discretion; probative value substantial and properly limited.
Denial of separate trials for Allen and Leaks	Joinder prejudicial due to weight of evidence against co-defendants.	Joint trial would contaminate proceedings and mislead jurors.	No abuse of discretion; joinder appropriate and no manifest prejudice demonstrated.

Crawford v. Washington, 541 U.S. 36 (U.S. 2004) (Confrontation Clause applies to testimonial hearsay)
Akins v. United States, 679 A.2d 1017 (D.C. 1996) (limits on party-opponent statements in joint trials to protect co-defendants)
Morten v. United States, 856 A.2d 595 (D.C. 2004) (harmlessness of improper plea proffers analyzed; pre-trial statements by co-conspirators)
Williams v. United States, 858 A.2d 978 (D.C. 2004) (confrontation-related analysis of testimonial statements)
Chapman v. California, 386 U.S. 18 (U.S. 1967) (harmless-error standard for constitutional violations)