Friday night, a police officer killed an unarmed black teenager. Police said that Tony Terrell Robinson Jr. disrupted the traffic and assaulted someone in a home.

After receiving calls about a man dodging cars and allegedly beating another person, veteran Madison police officer Matt Kenny responded to the calls. Kenny followed the teenager into an apartment, where Robinson hit Kenny on his head, said Police Chief Mike Koval.

Kenny shot the unarmed teenager, who later died in a local hospital. Yet another killing led activists to carry out a protest for the third day in Madison, Wisconsin. On Sunday, more than 100 people angry over the death of Robinson marched the streets of Madison towards the capital building.

The latest killing has increased the concerns of racial bias in the US law enforcement. Protestors were also carrying signs, beating drums and chanting 'The people united will never be defeated'.

The Wisconsin Department of Justice is carrying out an investigation. Meanwhile, Kenny is on paid administrative leave. Madison Mayor Paul Soglin has termed the shooting to be a 'tragedy beyond description'.

In fact, Paul has assured that the investigation would be carried out properly and they will be completely transparent in revealing results of the same. As per Wisconsin court records, last year Robinson has pleaded guilty to armed robbery. He even received a probated six-month sentence.

Koval affirmed that there is tension in the community and the death incident would likely lead to distrust. "When you have a person of color who is unarmed and that life is then taken, it's only natural that questions and objections should arise. I get that and I'm empathetic to that", affirmed Koval.