A method for interacting of a PSAP with a portable network device includes detection of a trigger signal of an eyewitness-button and storing call log data of the call by the PSAP. A signaling connection between the portable network device and the PSAP can be set up and a geographical area of interest close to the actual location of the portable network device can be determined. At least one external portable network device of a list can be scanned and the scanning result from the at least one external portable network device of the list can be forwarded to the PSAP via the signaling connection after it is protected by the PSAP. Systems and devices can utilize embodiments of the method.