>>> THEY ARE TWIN GIRLS, AND THEY'RE 8 YEARS OLD NOW. LAST YEAR WHEN THEY WERE 7, THEY LOST THEIR PARENTS IN WHAT POLICE ARE CALLING A STREET RACING CRASH IN REDWOOD CITY. THE DRIVERS ARE AWAITING TRIAL. TODAY THE FAMILY OF THE TWINS TOOK LEGAL ACTION, SPEAKING PUBLICLY FOR THE FIRST TIME TO SEND A MESSAGE. I SAT DOWN WITH THE GIRLS' UNCLE TODAY. >> PHYSICALLY, THEY'RE OKAY. EMOTIONALLY, THEY EXPERIENCE THIS EVERY DAY. THEY HAVE TO LIVE THROUGH THE ACCIDENT, WHICH THEY BOTH REMEMBER. >> Reporter: MIKE AMMON SAYS HIS NIECES THINK OF THEIR MOM AND DAD EVERY DAY. GREG AND GRACE WERE DRIVING HOME FROM DINNER IN NOVEMBER WHEN POLICE SAY THEY WERE KILLED BY STREET RACERS. THEIR TWIN IT DAY BY DAY AND DOING EVERYTHING THEY CAN TO SUPPORT THE GIRLS RATHER. >> A LOT OF TRIGGERS AROUND SIRENS, THINGS THAT WE ENCOUNTER EVERY DAY THAT FOR THEM CAN COMPLETELY TAKE THEM OUT OF THE PRESENT. >> Reporter: THE FAMILY FILED A CIVIL LAWSUIT AGAINST THE DRIVER, 17 YEARS OLD AT THE TIME, AND THE OTHER DRIVER, 23-YEAR-OLD KYLE HARRISON, AS WELL AS THEIR PARENTS AND THE PASSENGERS IN BOTH CARS, FOR WHAT THEY CALL RECKLESSLY RACING. POLICE SAY THE DRIVERS WERE GOING OVER 80 MILES AN HOUR DOWN EL CAMINO REAL. >> HERE WE HAVE PARENTS INVOLVED WHO KNEW THAT THE MINOR HAD A SOUPED-UP CAR, WHO KNEW THE MINOR WAS ENGAGED IN DRAG RACING AND DIDN'T TAKE ANY ACTION TO STOP IT. WE HAVE PASSENGERS IN A CAR WHO ARE YELLING AT THE DRIVERS, "BLOW THE LIGHTS, LET'S START RACING." >> Reporter: THE CRIMINAL PART OF THE CASE IS STILL WORKING THROUGH THE COURTS. THE SUSPECTS BOTH IN CUSTODY, BOTH FACING SECOND-DEGREE MURDER CHARGES. THE AMMON FAMILY HOPING THE JUVENILE SUSPECT WILL BE CHARGED AS AN ADULT. THE SAN MAY DAY KNOW COUNTY DISTRICT ATTORNEY TOLD ME HE HAS NOT YET MADE A DECISION. >> THERE WAS NO INTENT TO KILL, THERE WAS NO INTENT TO HARM. ON THE OTHER SIDE OF IT, THE HARM THAT WAS DONE IS SO OVERWHELMING. AND THAT'S WHAT MAKES THIS A DIFFICULT DECISION EVEN FOR SOMEBODY LIKE MYSELF. >> I THINK THE POINT FOR US IS TO SEND A MESSAGE TO ANY FAMILY THAT HAS A KID THAT'S LEARNING TO DRIVE OR THAT'S OF DRIVING AGE, THAT A VEHICLE IS A LETHAL WEAPON IN ANYBODY'S HANDS. >> IF THE JUVENILE, A HIGH SCHOOL SENIOR, IS NOT TRIED AS AN ADULT, THE LONGEST PRISON SENTENCE HE WOULD BE RECEIVING IS SEVEN
