About the only thing we can actually be certain of is that she's not been taking heroin recently: it would have shown up on the drug test which found the cocaine which sent her back to jail over the weekend.
However, the pictures are more than suggestive:
CROUCHING in a dark corner, Lindsay Lohan is poised to inject herself with what appears to be a syringe of heroin.
Our shocking picture shows the troubled Mean Girls star wrapping a tourniquet around her lower arm - the method addicts use to raise a vein.
Her right hand hovers the needle over the skin of her left arm.
Perhaps she was taking heroin: she wouldn't be the first and won't be the last person whio has tried it and doesn't carry on taking it.
Maybe it was just a pose for the cameras, a laugh with the girls?