(KRON) -- A 16-year-old Marin County girl who allegedly crashed an SUV packed with high school students in a quadruple fatal collision is being sued by one of the victim's parents. Four Archie Williams High School students were killed in the fiery crash on April 18, 2025: freshman Olive Koren, and sophomores Josalynn Osborn, 15-year-old Sienna Katz, and Ada Kepley. As the Volkswagen Tiguan SUV went up in flames, a 14-year-old passenger and the driver survived with help from good Samaritans who pulled the girls out. The survivors suffered severe burn injuries. Attorneys representing Katz's father, Robert Katz, filed a wrongful death civil lawsuit in December accusing the young driver of negligence. Woodacre crash victims Sienna Katz, Olive Koren, Josalynn Osborn, and Ada Kepley are seen. (Photos courtesy GoFundMe) "(The driver's) negligent conduct included, but was not limited to, failing to operate thevehicle at a safe speed for the roadway configuration and conditions, failing to maintain propercontrol, failing to keep a proper lookout, and failing to take reasonable evasive or correctiveaction to avoid leaving the roadway," attorneys with May Firm Injury Lawyers wrote in the lawsuit. The girls were heading to a sleepover when the tragedy happened, investigators said. In the same suit, Robert Katz is also suing Marin County for dangerous public road conditions. (Photo via CHP investigation report) San Geronimo Valley Road is a narrow, windy roadway the snakes between large redwood trees. By the accident scene, the posted speed limit is 40 mph. A California Highway Patrol investigation report found that speed was a factor for causing the accident. A photograph published in the report shows the mangled SUV’s speedometer with the gauge stuck at 60 miles-per-hour after it crashed into a redwood tree on San Geronimo Valley Road near Woodacre in Marin County. "It appeared that the speedometer was frozen in place and may indicate a pre-impact speed," the report states. The sole surviving passenger told investigators that the driver may have swerved on a blind curve to avoid crashing with another car that veered into their lane. CHP investigators concluded speed was the primary factor and officers did not find evidence of a second vehicle. (Photo via CHP investigation report) The 16-year-old driver had received her driver’s license just five months prior to the crash. Marin County authorities failed to make San Geronimo Valley Drive safe, the suit claims. Attorneys wrote in the suit, "Large fixed redwood trees were positioned immediately adjacent to the travel lane on a horizontal curve, the roadway lacked an adequate clear recovery zone, guardrails, or other protective barriers, and the curve was not adequately warned or delineated through appropriate signage, advisory speed warnings, chevrons, or other traffic control devices, all in combination with roadway geometry and maintenance conditions that created a foreseeable risk." Flowers cover a memorial where four girls died in a crash. (KRON4 Photo) The civil lawsuit demands a jury trial. On Thursday, attorneys representing Marin County filed a response to the suit and denied all claims of wrongdoing. In court filings, county attorneys asked a judge to either rule in favor of Marin County, or throw the lawsuit out entirely. In juvenile criminal court, prosecutors charged the driver with misdemeanor vehicular manslaughter with gross negligence. ...read more read less