In re C.A., 186 A.3d 118

Defendant C.A. was convicted of attempted first-degree murder while armed based primarily on testimony from two eyewitnesses, A.H. and his brother M.L., who identified C.A. as the shooter.
On cross-examination, defense sought to impeach A.H. with his failure to correct Officer Wertz when Wertz told another officer that “the one in black” (not C.A.) was the shooter; the trial court precluded use of bodycam footage to support that impeachment.
The government later elicited a prior consistent statement by A.H. to a plainclothes detective (Detective Roy) identifying C.A. as the shooter; the trial court admitted this statement over defense objection.
The trial court relied on the complainants’ ‘‘adamant’’ and ‘‘consistent’’ testimony, shell casings, and a low-resolution surveillance video in finding C.A. was the shooter.
The Court of Appeals held both evidentiary rulings (precluding impeachment with the bodycam and admitting the prior consistent statement) were abuses of discretion and not harmless, and reversed the conviction.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether defense could impeach A.H. by confronting him with bodycam evidence showing A.H. did not correct Officer Wertz’s statement that the man in black was the shooter	Mayhand/Govt: court required foundation proving A.H. actually heard the remark before impeachment evidence could be used	C.A.: a good-faith basis and relevance suffice; bodycam proffer provided foundation to impeach	Court: trial court applied too strict a foundation rule; impeachment was admissible and exclusion was an abuse of discretion
Whether the government could admit A.H.’s prior consistent statement to Detective Roy to rehabilitate him	Gov’t: statement admissible under Worthy rehabilitation exception	C.A.: statement did not predate any alleged motive to fabricate and did not directly rebut the targeted impeachment about first responders; admission was improper	Court: admission did not fit established exceptions (timing/completeness/Worthy) and was erroneous
Whether admission/exclusion errors were harmless	Gov’t: other evidence (casings, surveillance, brothers’ testimony) supported verdict	C.A.: errors undermined the only direct evidence identifying the shooter (eyewitness testimony)	Court: errors cumulatively were not harmless under Kotteakos and reversal required

Mayhand v. United States, 127 A.3d 1198 (D.C. 2015) (trial court abuses discretion when it applies incorrect legal standards)
Vaughn v. United States, 93 A.3d 1237 (D.C. 2014) (defendants entitled to wide latitude in impeachment)
Clayborne v. United States, 751 A.2d 956 (D.C. 2000) (good-faith basis standard for cross-examination)
Worthy v. United States, 100 A.3d 1095 (D.C. 2014) (limited rehabilitation exception for prior consistent statements)
Musgrove v. United States, 441 A.2d 980 (D.C. 1982) (general rule excluding prior consistent statements except narrow exceptions)
Mason v. United States, 53 A.3d 1084 (D.C. 2012) (prior consistent statement must predate motive to fabricate)
Davis v. Alaska, 415 U.S. 308 (1974) (cross-examination on matters relevant to witness credibility protected)
Kotteakos v. United States, 328 U.S. 750 (1946) (standard for reversal where nonconstitutional errors may have substantially influenced verdict)