If you’re walking around downtown Seattle, look up: You’ll see off-white boxes, each one about a foot tall with vertical antennae, attached to utility poles. If you’re walking around downtown while looking at a smartphone, you will probably see at least one—and more likely two or three—Wi-Fi networks named after intersections: “4th&Seneca,” “4th&Union,” “4th&University,” and so on. That is how you can see the Seattle Police Department’s new wireless mesh network, bought from a California-based company called Aruba Networks, whose clients include the Department of Defense, school districts in Canada, oil-mining interests in China, and telecommunications companies in Saudi Arabia. How accurately can it geo-locate and track the movements of your phone, laptop, or any other wireless deviceby its MAC address (its “media access control address”—nothing to do with Macintosh—which is analogous to a device’s thumbprint)? Can the network send that information to a database, allowing the SPD to reconstruct who was where at any given time, on any given day, without a warrant? Can the network see you now? The SPD declined to answer more than a dozen questions from The Stranger, including whether the network is operational, who has access to its data, what it might be used for, and whether the SPD has used it (or intends to use it) to geo-locate people’s devices via their MAC addresses or other identifiers.