WILLMAR — Marissa Elvira Mares, 30, pleaded guilty Tuesday to one charge of felony second-degree sex trafficking after introducing a woman to work as a prostitute in and profiting from it in November of 2018, according to court documents.

Mares, of Willmar, was originally facing four charges of felony second-degree sex trafficking in the case.

She is scheduled for sentencing July 13 and must cooperate with the presentence investigation as part of her release.

Mares has been in custody in the Kandiyohi County Jail since April 22 on multiple other charges.

According to the criminal complaint, the alleged victim told authorities that Mares had trafficked her twice. After she overdosed on drugs in November 2018, the woman said, Mares offered to help her.

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Mares then told the woman that she had arranged for a man to have sex with her. The meeting was in a camper in Montevideo. Afterward, the woman told police, Mares received $200 from the man and gave $60 to her.

Authorities were able to retrieve Facebook information that included a conversation between Mares and the man arranging his meeting with the woman.

In March 2019, the woman reported that Mares said a man had already paid to have sex with her.

According to the complaint, Mares told her she shouldn’t be ashamed, because “money is money.”

The woman was dropped off at a business, and the man took her to a motel room in Willmar. Mares later told the woman that Mares had received $200 from him, and she gave $50 to the woman.

The woman told authorities that Mares tried later to get her to provide sexual services on a regular basis, but she had not done it, according to the complaint.