After the Menendez parents are found murdered, the eldest son, Lyle, maintains a stoic appearance, while his younger brother, Erik, is grief-stricken; evidence suggests Lyle and Erik may be guilty; a defense attorney takes an interest in the case.

Detectives Zoeller and Linehan begin interviewing the brothers' friends and acquaintances; Erik makes a shocking confession to his psychologist; Abramson learns more about the Menendez family dynamics and makes a move to represent the brothers.

With Lyle and Erik in custody for suspicion of murder, defense attorney Abramson works tirelessly to understand what could drive two young men to commit such a crime; the prosecution tries to get tapes from Lyle and Erik's psychology sessions.

Erik and Lyle begin to reveal details of the psychological and sexual abuse they suffered at the hands of their parents; Leslie makes a case for Dr. Oziel's tapes to be thrown out of court; Pam Ferrero faces increased pressure from the DA's office.

A heightened level of public scrutiny emerges when Judge Weisberg allows the proceedings to be broadcast on television; the questionable ethics and motives of a star witness threaten his credibility; Leslie struggles with personal demons.

The jury hears the brothers testify in court for the first time; Leslie makes a surprising move after Judge Weisberg approves the unsealing of the brothers' confession tapes; closing arguments are made, and the verdict is left for the jury.

Lyle and Erik's juries' both struggle to reach a unanimous decision; Garcetti tries to counteract the declining public perception of the justice system; Judge Weisberg's performance in the trial comes under intense media scrutiny.

A second trial gets underway with Barry Levin joining the defense team; political collusion reaches an apex; Judge Weisberg disallows Lyle and Erik's family members to testify; Leslie learns revealing information about Jose and Kitty's childhoods.