A judge in Cincinnati has dismissed the charges against a white police officer who fatally shot an unarmed black motorist during a traffic stop, after a county prosecutor declined to pursue a third murder trial in the case.

Hamilton County Judge Leslie Ghiz declined to acquit former University of Cincinnati officer Ray Tensing in the shooting of Sam DuBose, but she dismissed the murder and voluntary manslaughter charges in a way that blocks retrial on those counts.

“It's sort of a note of finality, which is what we were looking for, although we still have the potential for a federal civil rights investigation,” defence attorney Stewart Mathews said afterward.

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Two juries couldn't reach unanimous agreement on the state charges, leading to mistrials. County Prosecutor Joe Deters said he felt “badly” about dropping the case but had concluded that he wouldn't be able to get a jury to convict Tensing.

Tensing, now 27, shot the 43-year-old DuBose in the head after pulling him over for a missing front licence plate on 19 July 2015. The shooting is among numerous cases nationwide that have called attention to how police deal with blacks, and it highlights the challenges prosecutors face in getting jurors to convict police officers for shooting when they say they're under threat.

Tensing, who was fired after the shooting, testified at both trials and said he feared he was going to be dragged or run over as DuBose drove away.

An expert hired by prosecutors said his frame-by-frame analysis of Tensing's body camera video showed Tensing wasn't being dragged by the car.

DuBose's family and civil rights groups wanted a third trial.

The family also was disappointed with the formal dismissal of the state charges, because it means those charges can't be brought again, DuBose's sister, Terina Allen, said.

The family now hopes federal authorities reviewing the case will determine that DuBose's civil rights were violated and will prosecute Tensing.

“We want them to give Sam some kind of justice,” Allen said.

US Attorney Benjamin Glassman said authorities will review evidence from the state court trials to assess whether there are possible federal civil rights offences that might warrant prosecution.

Mathews said Monday that he hadn't been contacted by federal authorities.

The university reached a $5.3 million settlement with DuBose's family, including free undergraduate tuition for his 13 children.

Shape Created with Sketch. Black Lives Matter organizes march to Trump tower Show all 15 left Created with Sketch. right Created with Sketch. Shape Created with Sketch. Black Lives Matter organizes march to Trump tower 1/15 Kandy Freeman participates in a Black Lives Matter protest in front of Trump Tower in New York City, U.S. January 14, 2017. Stephanie Keith/Reuters 2/15 People participate in a Black Lives Matter protest in front of Trump Tower in New York City, U.S. January 14, 2017. Stephanie Keith/Reuters 3/15 Hawk Newsome, a Black Lives Matter activist, leads a protest outside Trump Tower in New York City on January 14, 2017. Dominick Reuter/AFP/Getty Images 4/15 Hawk Newsome (C) leads a chant during a Black Lives Matter protest in front of Trump Tower in New York City, US. January 14, 2017. Dominick Reuter/AFP/Getty Images 5/15 People participate in a Black Lives Matter protest in front of Trump Tower in New York City, U.S. January 14, 2017. Stephanie Keith/Reuters 6/15 An NYPD officer speaks with a Black Lives Matter leaders during a protest in the snow outside Trump Tower in New York City on January 14, 2017. Dominick Reuter/AFP/Getty Images 7/15 Kandy Freeman participates in a Black Lives Matter protest in front of Trump Tower in New York City, U.S. January 14, 2017. Stephanie Keith/Reuters 8/15 An NYPD officer speaks with a Black Lives Matter leaders during a protest in the snow outside Trump Tower in New York City on January 14, 2017. Dominick Reuter/AFP/Getty Images 9/15 Carol Garza, a Black Lives Matter supporter, protests outside Trump Tower in New York City on January 14, 2017. Dominick Reuter/AFP/Getty Images 10/15 People participate in a Black Lives Matter protest in front of Trump Tower in New York City, U.S. January 14, 2017. Stephanie Keith/Reuters 11/15 A Black Lives Matter supporter protests in the snow outside Trump Tower in New York City on January 14, 2017. Dominick Reuter/AFP/Getty Images 12/15 Black Lives Matter activists march in front of Trump Tower on January 14, 2017 in New York City. Kevin Hagen/Getty 13/15 Black Lives Matter activists march in front of Trump Tower on January 14, 2017 in New York City. Kevin Hagen/Getty 14/15 Black Lives Matter supporters protest in the snow outside Trump Tower in New York City on January 14, 2017. Dominick Reuter/AFP/Getty Images 15/15 Black Lives Matter Kandy Freeman marches in front of Trump Tower on January 14, 2017 in New York City. Kevin Hagen/Getty 1/15 Kandy Freeman participates in a Black Lives Matter protest in front of Trump Tower in New York City, U.S. January 14, 2017. Stephanie Keith/Reuters 2/15 People participate in a Black Lives Matter protest in front of Trump Tower in New York City, U.S. January 14, 2017. Stephanie Keith/Reuters 3/15 Hawk Newsome, a Black Lives Matter activist, leads a protest outside Trump Tower in New York City on January 14, 2017. Dominick Reuter/AFP/Getty Images 4/15 Hawk Newsome (C) leads a chant during a Black Lives Matter protest in front of Trump Tower in New York City, US. January 14, 2017. Dominick Reuter/AFP/Getty Images 5/15 People participate in a Black Lives Matter protest in front of Trump Tower in New York City, U.S. January 14, 2017. Stephanie Keith/Reuters 6/15 An NYPD officer speaks with a Black Lives Matter leaders during a protest in the snow outside Trump Tower in New York City on January 14, 2017. Dominick Reuter/AFP/Getty Images 7/15 Kandy Freeman participates in a Black Lives Matter protest in front of Trump Tower in New York City, U.S. January 14, 2017. Stephanie Keith/Reuters 8/15 An NYPD officer speaks with a Black Lives Matter leaders during a protest in the snow outside Trump Tower in New York City on January 14, 2017. Dominick Reuter/AFP/Getty Images 9/15 Carol Garza, a Black Lives Matter supporter, protests outside Trump Tower in New York City on January 14, 2017. Dominick Reuter/AFP/Getty Images 10/15 People participate in a Black Lives Matter protest in front of Trump Tower in New York City, U.S. January 14, 2017. Stephanie Keith/Reuters 11/15 A Black Lives Matter supporter protests in the snow outside Trump Tower in New York City on January 14, 2017. Dominick Reuter/AFP/Getty Images 12/15 Black Lives Matter activists march in front of Trump Tower on January 14, 2017 in New York City. Kevin Hagen/Getty 13/15 Black Lives Matter activists march in front of Trump Tower on January 14, 2017 in New York City. Kevin Hagen/Getty 14/15 Black Lives Matter supporters protest in the snow outside Trump Tower in New York City on January 14, 2017. Dominick Reuter/AFP/Getty Images 15/15 Black Lives Matter Kandy Freeman marches in front of Trump Tower on January 14, 2017 in New York City. Kevin Hagen/Getty

Later Monday evening, a group of fewer than two dozen people walked quietly across an Ohio River bridge connecting Cincinnati to Newport, Kentucky, to show their support for Tensing. They were followed by about 40 counter-protesters holding signs and chanting their support for DuBose.

A few police officers monitored the events, but no problems were reported.

Associated Press

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