The Federal Rules of Evidence establish the framework within courts must make their determina tions as to admissibility. Under Rule 402, the baseline for admissibility is relevance. Evidence is relevant if it tends to increase or decre ase the probability of a fact at issue in the action. Fed. R. Evid. 401. The subject of this appeal is whether the district court abused its dis cretion in excluding testimony and data about the risk of harm that is created when a loaded and unlocked firearm is left in plain view and freely accessible to unauthorized users.

Is an expert's testimony about the psychological connection between the visibl e presence of unsecured firearms and death by suicide relevant to a jury's de termination on negligence?

Is an expert's testimony about the psychological connection between the visible presence of unsecured firearms and death by suicide relevant to a jury's determination on negligence?