A white police officer in the US is being praised after helping a black man get to his sister's funeral.

Mark Ross was trying to get home, when the car he was in, was pulled over by highway patrol for speeding.

He'd asked his friend to drive him to Detroit, which is 300 miles away. In addition, Ross had an outstanding misdemeanour warrant.

But instead of being arrested, Sergeant David Robison drove Mark some of the journey to be with his family.

Ross's post about what happened with the "good cop" has now been shared more than 126,000 times on Facebook.

The story is more significant at the moment because of the ongoing protests over shootings of black men by white police officers.

Ross later told Fox 2 Detroit News: "At the end of the ride when he dropped me off at the location, he reached over grabbed me by my shoulder and [asked] 'Mark, can I pray for you?'

"I said go ahead. And it was one of the most heartfelt prayers.

"I was lost, really. My mind was somewhere else at the time.

"I really thank God for him because Lord knows when I got back to the city.

"Like he changed my whole persona at that moment."

Although Ross says although he hopes his experience with the police can do something to calm some of the current unrest in America, he says he is focused on thinking about his family and sister.

But he added: "I really think I gained a brother and an angel at the same time."

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