it's not the article I remember but here's what I found after a search:

The woman, however, accused the police of forcing her to say she had a relationship with Morales, in a letter sent to Bolivia’s Ombudsman’s office.

“I have been a victim of police harassment,” she said in the letter. “They told me that if I did not say everything they imposed on me, they would prosecute me for sedition and terrorism. They forced me to testify under pressure, without a lawyer.”

I guess she went to the ombudsman (maybe she went to MAS too)