Two very different postures are available to someone facing criminal charges in Georgia, and they place very different demands on each side. A general denial puts the state to its proof: the defendant presents no separate defense and simply requires the prosecution to prove every element of the offense beyond a reasonable doubt. An affirmative defense takes a different path, admitting the act but asserting a legal reason it was justified or excused.
Common affirmative defenses include self-defense, insanity, and entrapment. Each concedes that the defendant did the thing charged while arguing that the law should not treat it as a crime under the circumstances.
The burden split is the part most often misunderstood. To raise an affirmative defense, a defendant carries a burden of production, meaning at least slight evidence supporting the defense must appear in the case. Once a justification defense like self-defense is properly raised, however, the ultimate burden shifts back to the state, which must disprove the defense beyond a reasonable doubt. The defendant does not have to prove the defense to win.
Insanity is the notable exception. Georgia presumes sanity, so a defendant relying on insanity generally must prove it by a preponderance of the evidence. This difference matters at trial: a general denial keeps the entire weight on the prosecution, while most affirmative defenses add a fact for the jury to weigh, yet still leave the state to overcome a justification claim once it is in the case. Choosing between the two shapes both the evidence presented and where the risk of doubt falls.