Ernest Robinson, an assistant girls' basketball coach at Martin Luther King Jr. High School, was accosted by two males Friday evening while walking two members of the girls' team outside King High, said Officer Cassandra Lewis, a police spokeswoman.
"They announced a robbery, a struggle ensued and he pulled a weapon and fired," said Lewis, who added that Robinson is a reserve police officer and licensed to carry a concealed pistol.
Michael Scott, a 16-year-old ninth-grader at the east side school, was shot and killed, according to Steve Wasko, a spokesman for Detroit Public Schools.
A 15-year-old male was wounded. His name was not released.
Detroit police homicide investigators submitted a warrant request this week to the Wayne County prosecutor's office. Prosecutors were reviewing the case Wednesday to determine whether to file charges, spokesman Mark Bernardi said.
Scott's mother has told reporters that her son did not have a gun.
"I lost my son and I want answers," Priscilla Scott said.