10:49 AM PT -- The driver in the crash was NOT arrested -- and law enforcement officials tell us they do NOT believe drugs, alcohol or speed was a factor.
The driver was not cited -- though we're told that person is cooperating with authorities.
We're told the case will be kicked over to prosecutors to evaluate but it's unlikely the driver will be hit with criminal charges.
In fact, as one person involved in the investigation put it ... "It appears to just be a horrible accident."
8:56 AM PT -- TMZ Sports just spoke with boxing legend Roy Jones Jr.