I was involved in a Florida truck accident where the truck jackknifed. Is the truck driver automatically liable for the truck accident?

“Jackknifing is a sign of negligence, possibly by the driver, but we’d have to investigate further to see why he jackknifed. Did he jackknife because everybody in front of him on the interstate was in an accident and he had to stop his vehicle to avoid hitting them? What is the specific reason he jackknifed? If he failed to control the vehicle, that may be a reason for us to consider a case against him. That case is gonna need further investigation.”