theodp writes: After a week that saw more than 40 people shot and at least 4 killed, Chicago politicians and police are at odds on whether to implement ShotSpotter, a camera and acoustic sensor-based gunshot-location system that is designed to pinpoint a shooter's location within seconds. The Chicago Police Department opposes such a move, saying ShotSpotter wasn't reliable in an earlier trial and — at $250,000 for a square mile of coverage — is too expensive. The company says the system has dramatically lowered crime rates in cities across the country. ShotSpotter is currently deployed in two countries and 51 U.S. cities and counties. And there's never been a better time to buy the patented technology, kids!