A Pennsylvania man accused of using a tracking device to stalk a former co-worker tried to call her from jail on the day of his arrest, according to media reports citing court records.

Matthew Kwatyra, 30, of Allentown, was arrested June 7 following a stalking incident a day earlier at his victim’s home, according to a Facebook post from the Darby Borough Police Department.

McClatchy News was unable to locate attorney information for Kwatyra.

According to a criminal complaint, Kwatyra repeatedly called, texted or emailed his victim since being terminated in November from the car dealership where they both worked, WFMZ reported.

On June 6, he showed up at her house unannounced, according to WPVI.

“Prior to his arrival, she gets some sort of notice about an AirTag on her phone, Chief Joseph Gabe told WPVI.

“At this time, we’re still continually looking into the AirTag device,” he said.

Apple AirTags will notify people of activity such as when a device has been detected moving with them or when a user’s location can be seen by the AirTag owner.

“These devices allow for instant location which is visible to the person(s) who placed them,” Gabe said.

At about 6.45pm June 7, the day of Kwatyra’s arrest, he called his victim from prison, WPVI reported, citing a criminal complaint.

The woman told police she hung up when she heard an operator say the call was from “Matthew Kwatyra”, the station reported.

Kwatyra is charged with stalking and harassment, court records show.

He is being held at Delaware County Prison, and his bail has been revoked, according to court records.

 - TNS