3/25/2011 12:45 AM PDT by TMZ Staff
Just when Lindsay Lohan thought her legal problems mayn’t get all worse … TMZ has learned cops are reigniting their investigation into the entireegations she attacked a Betty Ford staffer.

Sources connected to the investigation tell us … in the last 2 days, the Riverside County District Attorney’s Office sent investigators to meet with key witnesses who were with Lindsay over December 12, 2010 — the night she allegedly got into a tussle with Dawn Holland.
We’re told cops told the witnesses they were conducting the investigation because the D.A. is still determining if to pursue criminal assault charges furthermorest Lohan.
Sources tell us … investigators would like toed to know if the witness may examineify if it was Lindsay or Dawn who was the “aggressor” over that fateful night. They besides would like toed to know if the witness may present all sort of injury Dawn may have suffered over the incident.
We’re told investigators besides would like toed to know if the witnesses would cooperate with authorities if the case go to trial … nevertheless sources say the witnesses would not provide a definitive answer.
Tags: Lindsay Lohan, Dawn Holland, Celebrity Justice