The Ascension Parish Sheriff’s Office on Monday confirmed that a body discovered Thursday on the levee in Donaldsonville is that of 15-year-old Brandon Augusta, who was reported missing Aug. 10, Chief Tony Bacala said.

Bacala said Augusta’s death is a homicide, but he would not disclose how he was killed. The deputy said those details were part of the investigation. Deputies said last week that the body had suffered blunt-force trauma to the head.

In the meantime, deputies are following up on numerous tips, Bacala said.

Augusta’s mother said waiting to find out what happened to her son has been agony.

“To sit here as a mother of a 15-year-old and not know what happened …, ” said Katrina Augusta, Brandon Augusta’s mother.

She made the comment earlier Monday, before she was told that the body found Thursday had been positively identified as her son.

However, Augusta said she already knew that it was her son: She had been shown the clothing that had been on the body and recognized her son’s navy blue jersey and navy shorts.

“I’m doing it for Brandon,” she said of talking publicly about her son’s disappearance and death. “I want answers.”

Brandon Augusta was last seen on the evening of Aug. 9 when he was with a group of friends, Ascension Parish Sheriff Jeff Wiley said. He was reported missing the next morning.

Four days later, a man mowing grass on the levee reported to the Sheriff’s Office that he had detected a strong odor in the area. Deputies discovered Augusta’s body about 75 feet to 80 feet from the river in a pile of driftwood and rocks, Wiley said.

The East Baton Rouge Parish Coroner’s Office performed the autopsy.

The Sheriff’s Office previously had spoken with the Augusta family to inform them that indications were that the body was Brandon’s, Wiley said.

This year, Augusta would have finished his freshman year at Donaldsonville High.

He began school temporarily at the APPLe Digital Academy in Darrow, an alternative program for students, where he was completing work from middle school, said Johnnie Balfantz, public information officer with the school district.

His mother said she would do all she could to find out what happened to her son.

“Everybody talks good about Brandon. All his friends came here. They are in disbelief. Everyone is in disbelief at this minute,” Katrina Augusta said.