Ohio man's family demands answers after campus cop shoots and kills him during traffic stop
Samuel Dubose addresses the crowd during a vigil for his father, also named Samuel. (WCPO-TV)

Relatives of 43-year-old Samuel Dubose held a vigil for him on Tuesday while demanding a full investigation against the University of Cincinnati police officer who shot and killed him in the course of a traffic stop on Sunday, WCPO-TV reported.

"He didn't do nothing at all," his nine-year-old son, also named Samuel, tearfully said into a megaphone during the event held in the Mount Auburn neighborhood, where the elder Dubose was pulled over by a white campus officer, Ray Tensing.

CNN reported that, according to Cincinnati police, Tensing pulled Dubose over after spotting him driving without a front license plate. Dubose then allegedly refused to give the officer his driver's license and tried to give him a bottle of alcohol instead. Dubose's license was suspended at the time of the encounter.

Authorities said a struggle ensued when Dubose refused to get out of his car. Tensing shot Dubose once in the head as he tried to drive away. The car came to a halt after driving about a block away from the scene.

"He was coming home that night and we had a projector so we were going to watch a movie on it," the younger Dubose told WKRC-TV. "But we didn't get to do that because he died."

Tensing, who has been placed on administrative leave with pay, has not spoken with investigators yet, citing a rule allowing officers 24 to 48 hours to meet with their attorneys before doing so. Officials said they are reviewing security footage from nearby buildings. Tensing was wearing a body camera during the encounter, but no dashboard camera footage is available. A university spokesperson said Tensing was able to patrol the area, which is off-campus, because of a "mutual aid" agreement between both departments.

The Cincinnati Enquirer reported that, before he encountered Tensing on Sunday, Dubose had been charged more than 75 times over the past 20 years, with most of them for non-violent offenses like misdemeanor drug possession, driving without a license, and driving with overly-tinted windows, among others.

However, relatives said that within the past two years, Dubose had only been been arrested once, with the charges against him dismissed.

"It was unjustified. My son had no business getting killed," said his mother, Audrey Dubose. "I would love for the police officer that did this to let me know how could he put a gun to a human being’s head, any human being, not just my son."

Watch WCPO's report, as aired on Tuesday, below.