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Data obtained from a murdered woman's "Fitbit" activity tracker may have led police in California to the suspected murderer.

According to engadget.com—a website that reports on technology—data on Karen Navarra's "Fitbit" indicated that her heart rate "spiked significantly," then rapidly slowed and stopped during the 15-minute period that 67-year-old Anthony Aiello was in her home.

Aiello was arrested on murder charges and booked into the Santa Clara County Jail, the San Jose Police Department said.

Fitbit data has helped police find other suspected killers. Data from a Connecticut woman's activity tracker led police to charge her husband with her 2015 murder. Investigators also used Fitbit data in the case of Iowa college student Mollie Tibbetts. The 20-year-old had been missing for around a month before her body was found in August, and a 24-year-old man has been charged with her murder.

Fitbit's privacy policy states that it "may preserve or disclose information about you to comply with a law, regulation, legal process, or governmental request."