Woman and horse killed, One man arrested in I-15 crash
UPDATE 6/29/17 3:00 p.m. Dirk Johnson was arraigned on charges of vehicular manslaughter in Bingham County magistrate court Thursday. He posted $1,000 bond and has been released from the Bingham County Jail.
Johnson is scheduled for a pretrial conference before Judge Ryan Boyer in Blackfoot on July 25.
UPDATE 6/29/17 9:43 a.m.
An Idaho Falls woman has died and one man has been arrested following an accident Wednesday evening south of Idaho Falls along Interstate 15.
The accident happened around 4:55 p.m. south of exit 113 near the Church Road overpass.
Idaho State Police say, “Dirk Johnson, 59, of Idaho Falls, was traveling northbound in an empty gravel truck in the construction zone when traffic began to slow. Johnson was unable to slow down and veered into oncoming traffic. Shirley Williams, 65, of Idaho Falls, was traveling southbound in a Dodge 2500 pickup truck pulling a horse trailer. Mark Weidner, 44, of Pocatello, was traveling behind Johnson in a Nissan Maxima. Johnson struck Williams’ pickup truck head-on, struck the horse trailer, then struck Weidner’s vehicle.
Williams was transported by ground ambulance to Eastern Idaho Regional Medical Center where she succumbed to her injuries. The horse in Williams’ horse trailer died from injuries at the scene of the crash. Johnson and Weidner were not injured. All drivers were wearing seat belts. Next of kin have been notified. 
Johnson was arrested on vehicular manslaughter and booked into Bingham County Jail. This crash is under investigation by the Idaho State Police. The Idaho State Police was assisted by the Idaho Transportation Department and the Bonneville County Sheriffs Department.” 
Original story:
UPDATE 10:45 p.m. Police have confirmed the driver hauling the trailer is Shirley Williams.
UPDATE 9:45 p.m. – Police confirmed one person died in the accident.
UPDATE 6:00 p.m. – The Idaho State Police says a horse died in a three-vehicle crash on Interstate 15 near exit 113 in Idaho Falls Wednesday evening.
The accident happened around 5:30 p.m. south of exit 113 near the Church Road overpass.
Idaho State Police say the crash involved a white car, a semi hauling a dump trailer and a pickup hauling a horse trailer.
ISP says the semi crossed center line, hitting the pickup truck and trailer. The Semi jackknifed and hit a white car. This section of Interstate 15 is under construction, with northbound and southbound traffic down to one lane each on a single side of the freeway.
A horse was ejected from the trailer and died at the accident.
According to police, an ambulance took the driver of the pickup to Eastern Idaho Regional Medical Center.
