You asked if being cleared by the DA indemnified the driver. O.J. was acquitted of murder, but lost a civil case to the Goldman's. So it is an example of a case where being cleared of criminal charges did not indemnify the defendant against a lawsuit.
That's not to say an attorney might not get the case tossed, just that the DA deciding not to prosecute has nothing to do with a civil lawsuit.
That's not to say an attorney might not get the case tossed, just that the DA deciding not to prosecute has nothing to do with a civil lawsuit.