Okay, if a Nintendo switch attempts to connect to wifi, there is a slight possibility the router would have a log. If for example, lets say there is an eatery they frequent that has wifi. Gannon would connect his switch or phone to the wifi, and the device would store the password. Then the next time the device is within range, it will auto connect. Plus, the router logs connected devices. Subway has wifi and surveillance cameras.
This is my understanding (is there an acronym)
Justice for Gannon!