The film star was accused of attacking a rehab centre staff member in December of last year after sneaking out of the centre.
She then failed a random alcohol test in breach of her probation order. The probation report showed police interviews from nightclub staff who witnessed the star drinking.
Lohan has struggled with alcohol abuse and attended the rehab clinic after breaching the terms of her last drink driving conviction.
The probation officer working with Lohan believes that drug abuse is at the root of the defendants problems.