Investigators want to know exactly what led to a White police officer shooting and killing a 60-year-old Black man minutes after a traffic stop on Friday night. The North Carolina State Bureau of Investigation (SBI) was expected to interview Winston-Salem police Officer Dalton McGuire this week, the Winston Salem Journal reported on Monday.

State investigators were uncertain exactly why McGuire pulled over the vehicle in whichEdward Van McCrae was a passenger, SBI Special Agent Scott Williams told the newspaper. A radio exchange between the officer and dispatcher suggests that McCrae initially made the stop for a license check, the agent added. So far, only the police version of what happened next is available.

Read More: North Carolina Cop Kills 60-Year-Old Black Man Within Minutes After A Traffic Stop