Amanda Coleman appealed her malice-murder conviction for the death of two-year-old Brooklyn Aldridge, challenging evidence of methamphetamine use, limits on her expert’s alternative-cause testimony, and counsel’s failure to object to the prosecutor’s reasonable-doubt remarks. The Supreme Court of Georgia held the drug-use evidence relevant to the State’s neglect and impaired-caregiving theory and found no plain error in limiting speculative expert testimony. Given the correct jury instruction and the evidence, Coleman could not show prejudice from counsel’s failure to object to the closing argument. The Court affirmed.