Skip to main content
Bridge Michigan
Michigan’s nonpartisan, nonprofit news source

Arrests, privacy concerns mark first month of ShotSpotter’s use in Detroit

Guns image
Thirty states have child access prevention laws for guns. Michigan is not one of them.

Detroit police are testing a new law enforcement tool that could help fight gun violence in the city. ShotSpotter uses microphones and sound sensors to detect gunfire and provide police with real-time information on where and when a gun was fired.

The gun-detection program went live last month after sensors were installed in the city’s eighth and ninth precincts, on the northwest and northeast sides Detroit, covering a total area of around 6.5 square miles.


Critics say ShotSpotter surveillance is an invasion of privacy that will deepen the problem of over-policing in a majority Black and Brown city.

“The sensors will detect gunfire in a 100-yard radius, and then the police will look at any person in that radius as a potential suspect,” said Detroit Police Commissioner Willie Burton, who has raised concerns about ShotSpotter during several Board of Police Commissioners meetings.

“I just think it could lead to police profiling Black men just because they live in areas with heavy gunfire,” said Burton, who said he believes ShotSpotter will lead to more wrongful arrests.

The City first used ShotSpotter in 2014 during a 15-month pilot program that the California-based company provided for free. During that time, ShotSpotter detected, on average, one gunshot every four hours. Despite the prevalence of gunfire in the city, police didn’t expand the pilot at that time.

However, last November, after months of protests calling to defund the police following the murder of George Floyd by a Minneapolis police officer, the Detroit City Council approved a four-year, $1.5 million contract to implement ShotSpotter.

Police Chief James Craig praised ShotSpotter at a press conference days after launching the surveillance tech. According to Craig, ShotSpotter helped officers in the ninth precinct uncover a “ghost gun” manufacturing site inside a home on the city’s east side.

“We went live with ShotSpotter on Monday (March 8) afternoon and, within 24 hours, we got a hit,” Craig said.

As of April 23, the department says there have been 18 ShotSpotter gunfire-detection alerts  that led to  an arrest, and 65 guns have been recovered.

Burton, who represents the fifth district, compared ShotSpotter to the controversial facial recognition technology and questioned its value. He is also concerned about the cost of the technology.

“The police get so much money to spend on all this technology like (Project) Green Light and facial recognition, but has it made any of us actually safer? That same money could be going to fixing up rec centers and fixing up transportation for people. It seems like the police get to have new gadgets and technology when Detroiters have other needs right now,” he said.

Rodd Monts, the campaign outreach coordinator with the ACLU of Michigan, says he is concerned about ShotSpotter because the sensors have the ability to constantly record audio and any gunshot-like noise can trigger a police response.

“That does potentially open the door for them to collect other types of audio, so it could be used to surveil people without their knowledge,” Monts said.

Monts, who has been vocal about his concerns of over-policing and government surveillance, has been working with city officials to create the Community Input Over Government Surveillance (CIOGS) ordinance. If City Council approves it, the ordinance would give residents oversight of any surveillance technology used in the city.

Monts says the ordinance was drafted with technology like ShotSpotter in mind.

“It’s our position that if this technology is to be deployed in the city, there should be some standards around its use to protect from potential abuses or privacy invasion,” he said.

DPD Commander Michael McGinnis, who works in the ninth precinct, says that the only type of audio ShotSpotter monitors is gunfire.

“I think that’s really important to make sure it’s clear (it) doesn’t capture gunshots inside of buildings, so if someone is worried about it being used to spy on them in their house, it doesn’t capture any noises inside buildings,” McGinnis said.

As for the comparison to facial recognition technology and fears around wrongful arrests, McGinnis says he believes ShotSpotter is a great investigative tool, but a gunfire-detection alert is not the same as probable cause.

“We’ll have a detective or investigator come up to the scene to assess the situations that officers responded (to), they present a search warrant to the prosecutor, and once the prosecutor (is on) site, it goes to a magistrate for another overview,” McGinnis said. “Once it gets signed, then that’s how we will execute a search warrant.”

McGinnis warns that it’s too early to know how effective ShotSpotter is. 

“I mean we’ve had great success with it, but I don’t think we’ll actually be able to measure the actual outcomes until we have more time under our belt,” he said.

How impactful was this article for you?

Only donate if we've informed you about important Michigan issues

See what new members are saying about why they donated to Bridge Michigan:

  • “In order for this information to be accurate and unbiased it must be underwritten by its readers, not by special interests.” - Larry S.
  • “Not many other media sources report on the topics Bridge does.” - Susan B.
  • “Your journalism is outstanding and rare these days.” - Mark S.

If you want to ensure the future of nonpartisan, nonprofit Michigan journalism, please become a member today. You, too, will be asked why you donated and maybe we'll feature your quote next time!

Pay with VISA Pay with MasterCard Pay with American Express Pay with PayPal Donate Now