Researchers from Purdue University found a way for law enforcement to tap into any surveillance camera that's not password protected. As Wired points out though, the goal with this newly developed system isn't to help cops perform questionable acts, but rather make it easier for them to figure out how to better assist during a crime or emergency. To make that possible, engineers developed tools smart enough to find open-network surveillance cameras, including public ones, and then send their location to officials who are looking to scan a nearby scene.
Source: Wired