A system for determining the location of a person relative to a vehicle. In one embodiment, the system includes a first device comprising a first Bluetooth transceiver in the vehicle, a portable second device comprising a second Bluetooth transceiver and a first application program. The first application program identifies a first condition in which a link based on Bluetooth RF transmission exists between the first device and the second device when the person is in a first position close to or in the vehicle. The application program determines when the link is broken based on drop in signal level and provides notification through a network to a computer system when a determination is made that the link is broken. The notification is indicative of the person having moved farther away from the vehicle to a second position.