When you delete a device, it disappears from the Devices folder, and is added to the Unknown Devices folder. Evidence Manager provides two different menu options for deleting devices; using either has the same result.
To delete a device:
Log in to Evidence Manager.
Delete a device from the Address Book:
Go to Tools > Address Book.
From the list of devices on the Address Book window, select the device to delete, and click Remove Vehicle.
On the Delete Device window that appears, click Yes to complete the removal.
Delete a device using the contextual menu:
Expand Devices under Device Manager, find the device of your choice, and make sure that it is connected.