NEW : Attorney : Lexus does not admit liability . CNN 's Greg Morrison contributed to this report . 911 family members were killed in a Toyota crash last year . Four call : `` There 's no brakes '' Investigation : An accelerator pedal probably became stuck on a floor mat .
NEW : Attorney : Lexus does not admit liability . 911 family members were killed in a Toyota crash last year . Four call : `` There 's no brakes '' Investigation : An accelerator pedal probably became stuck on a floor mat .