The fired rehab staffer facing possible criminal charges for selling a privileged document and an interview about Lindsay Lohan has lawyered up, RadarOnline.com has exclusively learned.

Dawn Holland -- who told RadarOnline.com that TMZ paid her at least $10,000, before she was sacked -- has been told not to speak to media.

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“She is not talking to anyone, she has been advised by her lawyers not to talk to anyone,” the woman’s daughter-in-law, Kerra Mason, told RadarOnline.com, in an exclusive interview.

It is not known if the former Betty Ford Center worker is being advised by a criminal or civil attorney, nor if she and/or TMZ will be prosecuted.