"I was just logging Bluetooth devices on my phone … and started seeing body-worn cameras and tasers appear in the logs and [thought] that's a bit odd.

"I think it comes down to either incompetence or laziness … it just seems like the engineers who developed this were either ignorant or incompetent," he said.

In the wrong hands, he said it could be scaled up using dozens of tiny, cheap Bluetooth scanner units positioned around a suburb or town, which would track police devices on a live map.

"It could be used for ambushing the police, attacking them, escaping them … organised criminal gangs or whatever. Essentially it can be weaponised," he said.