We already knew from thorough investigation that immediately prior to the accident, either the driver of the first vehicle changed lanes without signaling or the driver of the second vehicle was driving with excessive speed  Either of these actions would make a driver liable for the resulting accident  But further evidence has proved that the first vehicle' s turn signal was not on, though the driver of that vehicle admits to having changed lanes
whether any other vehicles were involved in the accident
 So the driver of the second vehicle is not liable for the accident