A 5th-grade teacher in Texas is accused of fatally shooting her 17-year-old son while taking him to school, local reports say

• A Texas fifth-grade teacher, Sarah Hunt, is accused of killing her 17-year-old son as she was driving him to school on Monday, the Waco Tribune-Herald reported.
• McLennan County Sheriff Parnell McNamara told the Tribune-Herald that the police discovered Hunt's son, Garrett, with fatal gunshot injuries in the passenger's seat.
• The police found a .40-caliber pistol in Hunt's car, and Hunt told investigators that she "didn't mean to" kill her son, KWTX-TV reported, citing an affidavit.
• Hunt is charged with first-degree murder and is being held on $500,000 bond, the Tribune-Herald reported on Tuesday.

A fifth-grade Montessori teacher in Texas is accused of shooting her 17-year-old son and faces a murder charge, according to local news reports.

The teacher, Sarah Hunt, 39, was driving her son to school on Monday morning in Riesel. The police responded to a call about Hunt's unaccompanied Hyundai minivan on a road just outside Riesel and discovered her teenage son, Garrett, in the passenger's seat with fatal gunshot injuries, McLennan County Sheriff Parnell McNamara told the Waco Tribune-Herald.

KWTX-TV reported that an affidavit said the police also discovered a .40-caliber pistol, cartridge cases, and a magazine in and outside the minivan.

The affidavit said Hunt had walked to find help in Riesel, where authorities arrested her, the Tribune-Herald reported. The affidavit also said that she found two people and that a witness told authorities Hunt said, "What have I done?"

The affidavit said Hunt told officers that she "didn't mean to" kill her son, the Tribune-Herald reported.

"At this point we don't have a motive, we don't know what happened, we don't know what led up to this," Parnell told the Tribune-Herald on Monday. "It's a big mystery, and that's what we're trying to determine."

KWTX-TV reported that the affidavit said Hunt's son was with his father before Hunt picked him up to take him to his first day at a high school in Riesel.

Hunt is facing a first-degree murder charge and is being held on $500,000 bond at the jail in McLennan County, the Tribune-Herald reported.

The McLennan County Sheriff's Office did not immediately respond to Insider's request for comment.