Police work at the scene of Tuesday’s crash in Casco. Two women in one vehicle died and another driver remains in critical condition. Photo courtesy Cumberland County Sheriff's Office The mother and daughter from Bridgton who were killed Tuesday in a horrific crash on Route 302 in Casco were returning from a dentist appointment when their car crossed the centerline and struck another vehicle head-on, but there was no word from police on why the car veered into oncoming traffic, a relative said Friday. Jamie Mantz, 53, was driving her mother, Carol Strom, 80, home from the appointment when Mantz’s Jeep Liberty collided with an oncoming SUV, said Karen Kelson of Turner, Mantz’s sister and Strom’s daughter. Mantz had moved in with Strom about eight years ago after Strom’s husband died, and in recent months, Mantz functioned as Strom’s primary caregiver after Strom suffered a severe stroke in January. “She finally came home in May and still had left-sided deficits and was having physical therapy at home,” Kelson said.