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Shots fired. A man has been shot in the chest. Every second counts for his survival.

Before anyone even calls 911, officers are on their way, thanks to their ShotSpotter, which heard the gunshot, alerted police and pin-pointed the exact location of the shooting.

A ShotSpotter is a device that analyzes sound and can decipher gunshot noises from others.

This scenario described above, actually happened Wednesday night. Officers responded quickly, the man who was shot was transported to a hospital and will survive.

“Those activations have helped officers make arrests we wouldn’t normally have made,” said Sacramento Police Sgt. Bryce Heinlein.

Police say there have been more than 300 activations since they implemented ShotSpotters in June.

It started as a trial, and right now, they only cover a three-mile radius in the Del Paso Heights area, but thanks to their success, that’ll change soon.

“We are looking to expand into the South Sacramento area. And we’re excited about that,” said Heinlein.

“It’s a very good idea, we’re used to it. It’s a constant,” said Jeff Pierce, a Del Paso Heights resident, about gunshots in his neighborhood.

“It makes me feel a whole lot safer,” said Tanisha Jackson-Vital, who lives within the Spotter’s limits, and says her neighborhood needs them.

“Sometimes it’s scary, I don’t get out much, I work a lot, but sometimes it’s scary,” said Jackson-Vital.

And on a night like New Year’s Eve, when plenty of noises sound like gunshots to the naked ear, the Spotters know the difference.

“They can actually analyze whether it’s a firecracker, whether it’s a gunshot, or whether it’s a backfire on a vehicle,” Heinlein said.

It’s a cutting edge way for police to stay ahead of crime curve.