Investigators have charged an aged California man with killing his 67-year-old stepdaughter after information from her Fitbit, together with surveillance footage, allegedly linked him to the homicide scene.

Based on police experiences obtained by PEOPLE, Anthony Aiello, 90, was detained Sept. 25 on a first-degree homicide cost.

Police allege within the report that Aiello slashed and stabbed Karen Navarra, his 92-year-old spouse’s daughter, on Sept. 8.

Her stays have been present in her San Jose house on Sept. 13 after involved family members referred to as police to request a welfare verify.

When police arrived, the kitchen knife that had been used to chop her neck and head was discovered protruding from one among Navarra’s fingers.

The police report on the homicide alleges Aiello advised investigators he final noticed Navarra on Sept. 8, when he stopped by her house to deliver her meals.

He advised detectives he was inside Navarra’s residence for not more than 15 minutes, the police report signifies.

However police managed to recuperate surveillance footage from the neighborhood that they are saying confirms Aiello’s automobile was parked in Navarra’s driveway for greater than 20 minutes.

Additionally they recovered information from Navarra’s Fitbit machine.

The police report signifies that data confirmed Navarra’s coronary heart price spiked at round 3:20 p.m. on Sept. 8, on the similar time Aiello’s automobile will be seen in her driveway.

The info additionally signifies her coronary heart price began to gradual, finally stopping at 3:28 p.m., in line with the police report.

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Aiello has denied being in Navarra’s house on the time of the homicide and advised police another person needed to have been in his stepdaughter’s home.

“Through the interview, Aiello was confronted concerning the data from Fitbit and the corresponding surveillance video indicating that his automobile was within the driveway,” reads the police report. “After explaining the skills of the Fitbit to document time, bodily motion and coronary heart price information,” investigators advised Aiello that Navarra had died earlier than he left.

Aiello “denied that he was current when she was killed and prompt that another person may need been in the home,” the report says.

Aiello is being held with out bail.

He’ll doubtless be requested to enter a plea throughout his arraignment Thursday.

It was unclear Wednesday if he was being represented by a lawyer who may touch upon his behalf.

Fitbit didn’t reply to PEOPLE’s request for remark.

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