Lyle and Erik struggle to shape their defense before the trial. Then Menendez mania hits — from cheering crowds to fan mail and courtroom TV cameras.

A captivating witness alters courtroom dynamics, and Erik's testimony causes a sibling rift. The Menendez pop-culture moment begins to fade.

At a second trial, the prosecution aims to prove that Erik and Lyle are cold-blooded killers. After the verdict, the brothers face a new reality.