Lindsay Lohan’s lawyer is trying to build a legal case against the starlet’s dad, Michael, after a private phone call between the father and daughter was leaked to the U.S. press.

The actress threatened to file a restraining order against Michael, branding him a “lunatic” and saying he didn’t “deserve” to have kids.

Michael has repeatedly appeared on TV interviews and media events to make some $$ off his daughter claiming he wants to help Lindsay. He threatened to release all the taped phone calls if she didn’t get the help she needs.

The Mean Girls stars lawyer is figuring out if Michael broke any laws by leaking the tapes onto the internet. He says:

We are talking to legal authorities in New York and Los Angeles to determine if any laws were broken. This was a private phone conversation, and if this conversation took place in California then it was a violation of the law.

In a new blog post, Lindsay writes:

My father’s such a loser & those recordings are from years ago. To release personal things is foul enough, but to edit them. I used to think that he needed the book for dummies on learning how to be a father. He’s (sic) needs the book for dummies on HOW TO BE A MAN.

Sad, sad.