The Grootonk family was in a major car accident when a street car hit their car and drug them 225 feet in March of 1937. The accident had occurred on Mission BLVD in California.
Matilda passed away a little after the accident took place. She was only 9 years old. Her father William V. Grootonk Sr. was suffering from Spinal Cord injuries and passed away not long after her. Her brother William V. Grootonk Jr. incurred a fracture skull (per newspaper article). William Jr. was only 10 years when the accident happened.