Brian Walshe love triangle. Yale professor's search for justice. Plus, juror misconduct.

In Massachusetts, Brian Walshe comes face to face with his dead wife's lover in court. Prosecutors say the affair was Walshe's motive to kill his wife. Walshe says that's not true. Forty-three years ago in California, the body of Nancy Galvani was discovered floating under the San Mateo Bridge. For more than a decade, her daughter has suspected the killer was her own father. Last week, he was arrested. Updates in the cases of Luigi Mangione and the Gilgo Beach murders. Plus, NBC News legal analyst and defense attorney Danny Cevallos gives us the lowdown on juror misconduct. Find out more about the cases covered each week here: www.datelinetruecrimeweekly.com