Atlanta police have closed an investigation into a deadly shooting at the Ashby MARTA station after determining the shooter acted in self-defense, officials announced Monday.

The incident took place just before 7:30 p.m. May 8 at the transit station on Joseph E. Lowery Boulevard. According to police, two men were involved in a dispute that escalated to gunfire. The victim, later identified as 38-year-old Earl West Jr. of Fort Valley, died at a hospital.

Days after the shooting, investigators asked for the public’s help to identify the shooter and released two surveillance videos recorded on a MARTA bus. The videos showed the man boarding and exiting the bus wearing a distinctive backpack with a shark design.

It was not clear how he was identified, but police on Monday said they considered the case closed.

“After completing a thorough investigation, and consulting with the Fulton County District Attorney’s Office, homicide investigators were able to determine that the shooter in this case acted in self-defense,” a police department spokesperson said in a statement.

No charges will be filed against the shooter, whose name was not released.