We've been coming across a lot of stories lately about new surveillance technologies, most of which seem rather theoretical, without much evidence that they actually work in practice. But it appears that at least one of them, the gunshot sound detector, that can pinpoint the exact location of a fired shot, actually works. In Minneapolis, police claim to have made an arrest within hours after installing a new system. As soon as the shot was detected, police were able to locate and chase down the shooter. Currently, there are plans to install such a system in several more Minnesota towns, and an instant success such as this one will likely hasten their approval. But, one success doesn't really mean the system works. The police department, for example, probably won't be touting every time they go on a wild goose chase because a car backfired or a tire exploded. Now, in case a gunshot report isn't in itself enough to win a conviction, cities can add detectors that pick up on anger and suspicious behavior so as to add more circumstantial evidence.
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