Spy Car Is It Legal For A Coworker To Plant A Hidden Camera In Another Employee's Car And Spy On Them.?

Is it legal for a coworker to plant a hidden camera in another employee's car and spy on them.? - spy car

I heard an employee say that they were monitoring the activities of other employees outside of work, including employees of the car hanging on the brakes and even disappeared in practice, a device hidden camera. Is this legal?