NASHVILLE, Tenn. — Nashville police officers who stopped the Covenant School shooting last week spoke out publicly for the first time on Tuesday, detailing the shock and horror of the incident.

They described the smell of gun power and stepping over bodies before firing the bullets that stopped the shooter.

“Last Monday was a day that we all hope we’d never see anywhere, and especially here in Nashville,” Police Chief John Drake said.

The shooting March 27 left three children and three adult staff members dead. The incident was one of Tennessee’s deadliest school shootings.

The shooter, identified by police as 28-year-old Audrey Hale, broke into the private elementary school around 10:11 a.m. and was armed with a rifle. Officers who responded to the scene killed Hale about 14 minutes later.

Det. Michael Collazo and Officer Rex Engelbertfired the fatal shots , according to Nashville police. They were joined by Det. Sergeant Jeff Mathes Tuesday afternoon at a news conference held at the Metro Nashville Police Department headquarters.

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Mathes, who first entered the school with Engelbert, retold the series of events from his point of view. They began to sweep the first floor, following training protocols. When they heard gunfire, they quickly went to the second floor.