McCalop v. State

Sasha McCalop was convicted of malice murder for stabbing her boyfriend of three years, Michael Martin, after a violent fight at the rooming house where they lived. Their relationship had involved multiple police-reported incidents of domestic violence, and McCalop told police she grabbed a knife in self-defense when Martin choked her and would not let her leave. At trial, her expert testified she had post-traumatic stress disorder (PTSD) and battered person syndrome (BPS), while the State's rebuttal expert questioned whether BPS had scientific validity and whether it explained her behavior that night. On appeal, McCalop argued the trial judge wrongly let the State's expert comment on her state of mind and criticize BPS instructions, that the prosecutor improperly attacked BPS in closing, and that the judge wrongly allowed bad-character evidence after a defense witness described her as calm and non-aggressive. The Supreme Court of Georgia found no reversible error in any of these claims and affirmed the conviction and the trial court's rulings.

The trial court did not err in admitting the State's rebuttal expert's testimony, which did not amount to impermissible opinion on McCalop's mental state at the time of the stabbing and did not require prior Georgia courtroom experience to qualify as an expert; remaining claims were either waived or, if erroneous, harmless given the strong evidence of guilt.

The ruling confirms that Georgia trial judges have broad discretion to qualify expert witnesses even without local courtroom experience, and clarifies limits on what expert testimony counts as improper 'state of mind' evidence, guidance that will shape how domestic violence and battered person syndrome defenses are litigated statewide.

Affirmed

1. The court applied Georgia's evidence rule allowing experts to base opinions on facts they didn't personally observe (OCGA § 24-7-703), so the rebuttal expert could testify about McCalop's relationship and interview even though he never evaluated her personally.
2. The court distinguished permissible general testimony from improper opinion on an accused's mental state at the time of the crime (OCGA § 24-7-704(b)); because the expert's comments addressed the relationship's dynamics and inconsistencies in her police statements rather than her mindset while using the knife, they were not barred.
3. On qualifying the expert as a witness, the court applied the abuse-of-discretion standard, meaning the trial judge's ruling stands unless clearly outside reasonable bounds, and found no rule requiring an expert to have prior Georgia courtroom experience or familiarity with Georgia law to testify about scientific matters.
4. Because McCalop's own attorney elicited the expert's testimony that courts were wrong to instruct juries on battered person syndrome, the court held she invited that error and could not complain of it on appeal.
5. On the claim that the expert's skepticism about battered person syndrome's scientific basis was improperly admitted, the court applied the plain-error test, which requires showing the error likely changed the trial's outcome, and found no such effect because the jury was still instructed it could consider battered person syndrome evidence and both experts agreed she had PTSD.
6. The court held that any error in allowing cross-examination about McCalop's alleged past bad acts after a witness said she was calm and non-aggressive was harmless beyond doubt given the undisputed use of the knife, prior violent incidents, and inconsistencies in her account matched against the 911 recording.

• murder conviction
• battered person syndrome
• expert testimony
• domestic violence
• self-defense