on Saturday, September 8th, at 3:20 pm, Karen Navarra’s Fitbit recorded her heart rate spiking. Within 8 minutes, the 67-year-old California woman’s heart beat rapidly slowed. At 3:28 pm, her heart rate ceased to register at all. She was dead.
Two pieces of technology led police to charge Ms. Navarro’s stepfather, Anthony Aiello, with allegedly having murdered her. Besides the Fitbit records, there are also surveillance videos that refuted Aiello’s version of events.