Investigation : Investigation : Family does not admit liability . Four family members were killed in a car accident last year . 911 call : ` ` There 's no ... '' Investigation : An oil pedal probably became stuck on a floor mat .
NEW : Attorney : Toyota does not admit liability . Four family members were killed in a Lexus crash last year . 911 call : `` There 's no brakes '' Investigation : An accelerator pedal probably became stuck on a floor mat .