KOUNTZE, Texas -

A Southeast Texas grand jury has indicted a 40-year-old Kirbyville woman on manslaughter charges for a traffic wreck earlier this year that killed two sisters and an unborn baby.

Crystal Lummus Boyett also was indicted Thursday by a Hardin County grand jury on a charge of aggravated assault with a deadly weapon for the February deaths of sisters Connely Renne Burns and Courtney Ray Sterling. Burns was seven months pregnant.

Hardin County District Attorney tells The Beaumont Enterprise police found the prescription drug Xanax in Boyett's car after she collided with the victims' SUV but there's no evidence she was intoxicated. Police say Boyett was speeding and may have reached 120 mph on U.S. 96 between Buna and Lumberton.

She's been free on $1.5 million bond.