Hardin County Commissioners have approved a $1,500 retainer fee to allow prosecutors to hire an expert on vehicle "black boxes" to give testimony during Crystal Boyett's trial.
District Attorney Dave Sheffield tells 12News his office made the request and that the "black box" is cutting edge technology to help during testimony.
Sheffield says many vehicles have black boxes like planes and are a "wealth of information."
Boyett is accused of causing a February 2014 wreck that claimed the lives of two Lumberton sisters, one of who was pregnant.
Police say Boyett was clocked driving 121 miles per hour on Highway 96 just moments before the crash.
Connely Rene Burns, 20 and her unborn child, along with Courtney Ray Sterling, 15, died in the wreck.
Their mother was injured.
Boyett is currently out on a $2.4-million bond.
Boyett's trial is set for April 2015.
