(Reuters) – An 18-year-old Missouri man was arrested on Wednesday for fatally shooting an unarmed black motorist in a suburban St. Louis suburb after he was pulled over for speeding, the St. Joseph County prosecutor said.
The 18-month-old baby girl who was killed was taken to a hospital where she was pronounced dead, county prosecutor Thomas G. McMahon told a news conference.
The officer involved has been placed on paid administrative leave.
The baby’s mother, the mother of two boys, told reporters that her son was pulled off the freeway in Ferguson, about 30 miles (48 kilometers) south of St. Charles, Missouri, where a similar shooting happened earlier this month, and shot in the head by a police officer.
“He was just walking away from his girlfriend, who was pregnant, when a cop pulled up behind him and said, ‘What’s up, bro?'”
The woman told reporters she had called 911, but the call ended.
She said her son had been shot twice in the chest.
The shooting happened on Tuesday evening near a police patrol car, McMahon said.
The baby’s body was found about an hour later.
The officer was identified as Officer Michael Schwalbach, a 25-year veteran of the St Louis County police department.
He had been placed under suspension and the department was conducting an internal affairs investigation.
McMahon did not provide a motive for the shooting.
The St. Martin Police Department did not immediately respond to a request for comment.
A manhunt was underway for the driver of the police car, who police identified as a 17-year old black man.
The Ferguson suburb of St Louis has been plagued by tensions between police and black residents over the killing of Michael Brown, an unarmed 18-years-old.
Brown was killed in August by a white officer in the street in Ferguson after a traffic stop.
Ferguson police have said that they do not believe Brown was the aggressor in the shooting but say he was the victim of racial profiling by white officers.