06/18/2025
NEWS | The Cambridge Public Safety Committee held a hearing on the police department’s use of SoundThinking, formerly ShotSpotter, on June 2. The gunshot detection system, used in both Cambridge and Somerville, has recently drawn criticism from residents — particularly because both cities are sanctuary cities.
Residents who spoke at the meeting criticized the technology as a form of mass surveillance and questioned its effectiveness.
“I don’t trust the ShotSpotter technology to be doing what the representative claims that it does,” Danforth Nicholas, a community member, said during the meeting. “This is not public safety. This is undisclosed surveillance.”
Critics warn that because SoundThinking devices record continuously and can capture conversations, they pose a risk of misuse. Spencer Piston, professor of political science and director of advanced programs at Boston University, cited Paul Greene, a customer support engineer who testified under oath in a Massachusetts case in 2015 about SoundThinking’s recording capabilities.
“ShotSpotter centers record 24 hours a day, seven days a week. A conversation at a normal volume may be recorded by a sensor up to 50 feet away, ” Piston said, recalling the testimony. “In effect, the listening to conversations is continual.”
For some, this is especially troubling because SoundThinking is not funded by the cities of Somerville and Cambridge, but by the Department of Homeland Security, which oversees Immigration and Customs Enforcement.
“We know that ICE and DHS, more broadly, are trying very hard to upgrade their capacity,” Piston said. “So, from a sanctuary city perspective, it might not be the best idea to build a surveillance state for them.”
Anika Parr reports.
The Cambridge Public Safety Committee held a hearing on the police department’s use of SoundThinking, formerly ShotSpotter, on June 2. The gunshot detection system, used in both Cambridge and Somerville, has recently drawn criticism from residents — particularly because both cities are sanc...