The L.A. County Probation Department believes Lindsay Lohan is a drug addict.
According to the probation report, Lindsay's probation officer wrote, "Substance abuse is the root of the defendant's problems."
Judge Stephanie Sautner begged to differ this AM, saying she did not believe Lindsay's problem was drug related.
The Probation Report lists the drugs Lindsay has been taking: Trazadone (for depression), Nexium (for heartburn), Yaz (birth control), Zoloft (anti-depressant), Doxycycline (antibiotic), Zyrtec (allergies) and Zythromax (antibiotic).
The Probation Report mentions Lindsay failed an alcohol test on February 8, 2011 -- this is about a month AFTER Lindsay left the Betty Ford Clinic.
As for that alleged attack at Betty Ford, the report also states that cops have interviews with restaurant employees, hotel employees, and nightclub employees saying that Lindsay was drinking that night.
And the Probation Report says Lindsay is a serial shoplifter: "Defendant has been suspected of similar conduct in other jewelry stores ... As a result [the detective in the necklace case] recommends that the defendant ... be ordered to serve at least six months in county jail."