Saginaw police say the city's gunfire detection system contributed to seven arrests linked to celebratory shootings on New Year's Eve.
Saginaw has ShotSpotter technology that lets authorities trace the location of gunfire.
Mlive.com (http://bit.ly/UHdZLF) says acting police Chief Brian Lipe announced on New Year's Eve that police planned to use the technology with the department's integrated camera system to trace violators.
Lipe said Tuesday that city, state police and prison authorities made three arrests. He says one was for a parolee possessing bullets, a second for marijuana possession by a probationer and a third for a sex offense.
Earlier, police arrested four people after tracing gunshots.
Saginaw got a $280,000 U.S. Department of Justice grant to buy the technology from Mountain View, Calif.-based ShotSpotter Inc., and installed it in 2009.
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