A system includes a client device and a server computer coupled to a network and in communication, via the network, with the client device. The server computer is configured to receive, from the client device, a queue request. The queue request includes a candidate identifier. The server computer is configured to determine a risk factor for a candidate associated with the candidate identifier, and, upon determining that the risk factor indicates a high probability of inappropriate behavior during evaluation by the candidate by comparing the risk factor to a risk threshold encode into a first array defining a first candidate queue a reference to the candidate identifier, identify, in a first administrative queue, a first administrator identifier, the first administrative queue being designated as an administration escalation queue, and establish at least one of a first video connection and a first audio data connection between the client device and a first administrator device associated with the first administrator identifier.