SOUTH BEND -

A South Bend teen is expected to be sent to adult court for a traffic crash on U.S. 31 that killed three people in August 2013.

Robert and Judith Hillers climbed into their vehicle Sunday, August 18 looking forward to a relaxing two-week vacation.

They were driving to Indianapolis to catch a flight that would take them to California, where they planned to tour Yosemite National Park and visit a family friend.

Judith’s cousin, Janice Cash, was riding with them. She had been living with the couple in their South Bend home since the previous June and planned to drop them off at the airport and drive the vehicle back to South Bend.

They never made it.

Robert Hillers, 59, Judith, 54, and Cash, 56, who lived in Anderson, Ind., were all killed in the auto crash on U.S. 31 near Baughman Court, just south of South Bend city limits.

Police said the couple’s southbound vehicle was struck head-on by a northbound minivan driven by Carlos Rios-Sanchez of South Bend, a Riley High School student.

Rios-Sanchez, who was 17-years-old at the time, is now 18.

On Friday, the St. Joseph County prosecutor's office filed a "Petition Alleging Delinquency" against the teen.

Rios-Sanchez faces three counts of Reckless Homicide.

The prosecutor's office also filed a motion to waive the teen to adult court.

The state claims Rios-Sanchez' minivan crossed the centerline of U.S. 31 when he crashed into a Toyota Rav 4. The Hillers and Cash were all in the Rav 4. The impact pushed the Rav 4 into a pickup truck.

According to investigators, had Rios-Sanchez not crossed the centerline into the southbound lanes, the crash would not have happened.

A hearing is set for July 11.