Lindsay Lohan's father thinks she is smoking methamphetamine or crack cocaine.
Lindsay Lohan, the troubled actress - whose probation was revoked in a Los Angeles court yesterday (19.10.11) - was pictured last week with badly stained and damaged teeth and her dad Michael believes the damage stems from her smoking the illegal substances.
He told 'Issues' host Jane Velez-Mitchell: "That's from smoking a pipe with meth or crack. She's smoking either crack or meth, one or the other. I'm not going to shade it.
"If you're talking about prescription medication it would affect all your teeth, not just your two front teeth. You can't dance with the devil and expect to go home with Jesus."
Michael - who has a strained relationship with the actress and her mother Dina - has called for the court to force Lindsay to be tested for drugs and wants a sober coach appointed to ensure she stays on the right path.
Referring to yesterday's court hearing in Los Angeles at which Lindsay was cuffed and taken into custody after her probation was revoked, he told HollywoodLife.com: "I hate seeing my daughter in cuffs. She belongs in rehab! Why don't they institute drug testing? Get drug testing involved! Keep her straight! Make sure she's in an outpatient programme.
"They need to put a sober coach with her! A no nonsense sober coach! I'm sick of this, when she wants to be honest with herself and live up to her responsibility she'll turn her life around. But she has learned too much of the opposite from her mother."
The showbiz patriarch also wants all negative influences to be made to stay away from his daughter - who has been released from custody after her $100,000 bail was posted.
He said: "My mission is to get rid of all the people in her life that are kicking her down. I'm going to eliminate them from her life. I'm going to do all I can … not physically but I'm going to put them in a position where they can't be around her."