RALEIGH, N.C. - A trial court properly found that a murder defendant's use-of-force expert testimony about the victim's threatening-behavior clues was unreliable and unhelpful, a North Carolina Court of Appeals panel held Jan. 21 (State of North Carolina v. Charles Anthony McGrady, No. COA13-330, N.C. App.; 2014 N.C. App. LEXIS 55).