Former officer Michael Slager, 33, had been jailed in April after being charged with the murder of Walter Scott, 50, in North Charleston city. Slager shot at Scott's back eight times while he was running away from him. The whole incident was filmed by a passer-by on his mobile phone, Xinhua reported.
If convicted of murder, Slager would face between 30 years and life in prison without parole, said prosecutor Scarlett Wilson, adding that no trial date had been set yet.
Previously, possibility of death penalty was also on the table after prosecutors announced the murder charge against Slager on April 7, the same day the mobile phone clip was handed over to authorities. However, Wilson said the death penalty did not apply here since no aggravating factors, such as robbery or kidnapping as required under South Carolina law, existed in the case.
The fatal encounter took place on April 4 when Slager, then patrolman in the North Charleston Police Department in South Carolina, stopped Scott's vehicle for a broken taillight. After what first appeared to be routine interaction between a driver and an officer, which was recorded by dashboard camera in Slager's patrol car, Scott fled on foot.
US cop may get 30 years of jail without parole
Scott's family later said he ran probably because he feared that outstanding child-support obligations would lead to his arrest.
Once Slager caught up with Scott, the two allegedly got involved in a tussle over Slager's Taser.
As Scott again ran away from Slager, the police officer fired eight times towards Scott and killed him.
"We're going to patiently wait for the criminal trial in this case," said Chris Stewart, one of the attorneys for the Scott family, in a press conference after the announcement of indictment. "We're going to continue to do that until the resolution of the criminal and the civil case."
Given the prerogatives police officers are endowed with in the country, whether Slager will finally be convicted of murder charge is far from certain.
According to an analysis report by the US daily, The Washington Post and researchers at Bowling Green State University in April, only 54 officers have been charged among the thousands of fatal shootings at the hands of police since 2005.
No database of police-involved deadly shooting exists since the US Federal Bureau of Investigation does not require police department nationwide to report office shootings.
"...even in these most extreme instances, the majority of the officers whose cases have been resolved have not been convicted," said The Post analysis.