Jackson v. United States, 76 A.3d 920

Otis Jackson Jr. was convicted by a single jury in a two-phase trial of murdering his brother, threatening their father, and arson; several related weapons offenses were also tried and some convictions later remanded for further proceedings.
The November 20, 2003 killing occurred in their shared DC home; evidence showed Jackson gathered weapons, placed them in his room, and spread gasoline to set the house on fire.
In the merits phase Jackson claimed imperfect self-defense due to demon possession; in the insanity phase he argued lack of responsibility due to schizotypal personality disorder and other brain disorders.
The defense theory evolved with expert testimony; the government presented psychiatrists who disagreed with the defense’s psychiatric theories and suggested malingering.
The trial court bifurcated the trial but ruled to have a single jury hear both phases; the defense challenged bifurcation and several trial procedures as prejudicial, while the court protected against certain cross-phase prejudice.
On appeal the court affirmed most convictions but remanded Counts 6 and 8 (carrying a pistol without a license and possession of an unregistered handgun) for a Plummer-style hearing to determine whether the preconditions for handgun registration existed.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Bifurcation procedure and juries	Jackson contends bifurcation before a single jury was prejudicial.	Jackson argues two separate juries were required to avoid prejudice between phases.	No abuse of discretion; one jury bifurcated trial adequate.
Admission of expert mens rea testimony	Bethea does not bar the requested expert testimony on mens rea via observation.	Bethea barred diminished-capacity-style expert testimony; Clark supports admitting observation evidence.	Bethea controls; testimony barred; Clark does not compel admission; error deemed non-prejudicial.
Denial of ultimate-issue testimony	Experts should be allowed to address causation in insanity context per Bethea and Clark.	Bethea barred ultimate-issue testimony about mental state causation.	Error plain but not reversible; ultimate-issue testimony properly limited, not prejudicial.
Denial of rebuttal evidence	Defense deserved rebuttal by Dr. Blackmon to counter government experts.	Rebuttal would be duplicative and prejudicial.	No abuse of discretion; denial not reversible.
Second Amendment challenge to CPWL, UF, UA	Registration/licensing bans should invalidate CPWL and UF convictions under Heller.	Statutes apply; convictions may be unconstitutional as applied; remand appropriate to assess registration feasibility.	Remand on Counts 6 and 8 to determine registration feasibility; other convictions sustained.

Holmes v. United States, 363 F.2d 281 (D.C. Cir. 1966) (bifurcation considerations in insanity cases)
Lucas v. United States, 497 A.2d 1070 (D.C. 1985) (substantial claim required for bifurcation)
Jackson v. United States, 404 A.2d 911 (D.C. 1979) (insanity prejudice concerns in bifurcated trial)
Taylor, 510 F.2d 1283 (D.C. Cir. 1975) (separate juries for phases; insanity evidence prejudice)
Bethea v. United States, 365 A.2d 64 (D.C. 1976) (rejection of diminished capacity; limits on expert testimony on mens rea)
Clark v. Arizona, 548 U.S. 735 (2006) (observation vs mental-disease/capacity evidence; due process concerns)
O’Brien v. United States, 962 A.2d 282 (D.C. 2008) (Bethea framework for diminished capacity; expert testimony limits)
Smith v. United States, 686 A.2d 537 (D.C. 1996) (diminished capacity doctrine; Bethea lineage)
Doepel v. United States, 434 A.2d 449 (D.C. 1981) (insanity and mental state limitations)
Benn v. United States, 978 A.2d 1257 (D.C. 2009) (ultimate issue testimony doctrines; flexibility in DC law)
Plummer v. United States, 983 A.2d 323 (D.C. 2009) (remand to assess pre-charge registration/licensing possibilities)
Gamble v. United States, 30 A.3d 161 (D.C. 2011) (Second Amendment limits on handgun possession post-Heller)
Snell v. United States, 68 A.3d 689 (D.C. 2013) (CPWL registration scope and home possession)