For Rochester police, the gunfire detection system known as ShotSpotter has been a valuable tool, alerting them to possible shootings and speeding up the police response time.

But, more than that, the system — which tries to locate gunfire through audio sensors placed in high-crime areas in the city — has also become part of courtroom testimony, with prosecutors using the recordings as evidence to bolster their allegations of where and how many shots were fired in criminal incidents…

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The alert blares from the computer like a ray gun from an old cartoon: WAH-wahwahwahwah. Jonathan, a ShotSpotter analyst, focuses on one of the six monitors in front of him and zooms in on a street-level map of Milwaukee. Next to the map are what look like Christmas trees on their sides–a cluster of green sound waves…

How much violence does each of New Jersey’s most populous cities see?

Here’s a closer look at the State Police Uniform Crime Data for the largest cities in the state based on population. The 2016 data covers crime reported from January through December, 2016. Population figures were taken from the latest census data.

Overall, the state saw 375 homicides (up from 369 in 2015) and 1,451 rapes or attempted rapes (up from 1,362). Robberies and assaults were down, both slightly, and incidents of violent crime in the state decreased by 4.3 percent in 2016 compared to 2015…

Magic bullet for Allentown? New citywide system would pinpoint gunshots…