Embodiments include peer-to-peer ad hoc network having a group having a plurality of members, each of the plurality of members comprising a locating device, wherein the plurality of members are configured to detect an absence of one of the plurality of members from the group. The system also includes a location server configured to communicate with the locating device of at least one of the plurality of members and a supervisor device configured to receive an alert from the location server, wherein the alert is generated by the location server in response to a detection of the absence of one of the plurality of members from the group.