Investigators said the shooting happened after the student and a young man argued in the parking lot across the street from the school and the girl walked away.
The man fired six rounds in her direction, toward the school, and one bullet hit her shoulder, before he ran away, police said. The girl was taken to Eskenazi Health Hospital in good condition.
During the investigation, Officer Mark Decker, a 30-year veteran of the IMPD, spoke with the suspect’s mother, who convinced the suspect to turn himself in to police.
Police identified the suspect as William Alvies, 19, of Indianapolis. He was preliminarily charged with attempted murder.
According to the victim's grandmother, Rose Wilson, a restraining order had been placed against Alvies. Wilson said her granddaughter and Alvies were in an unhealthy, on-and-off relationship.
"They were on-and-off boyfriend and girlfriend. They are little young things. She quit him and they were supposed to get back together. She quit him again so he said he was going to kill her Monday. Monday he was supposed to kill her, but he made today the day," Wilson said.
Indianapolis Public Schools Superintendent Dr. Lewis Ferebee thanked police for their swift action in tracking down the suspect.
"We’re happy to know our student is on the road to recovery, and her suspected attacker, who is not an IPS student, is now in police custody. I trust Arsenal Tech’s strong and spirited community will continue to move forward celebrating the groundbreaking year we’ve had thus far and looking ahead to even greater student success," Ferebee said.