Authorities say a registered sex offender performed at a high school assembly in Washington state even though she's not allowed to be where minors congregate.

The Tri-City Herald says (http://goo.gl/7HmcMV ) Melissa Salsbury had been sentenced to nearly a year in jail for her role in forcing underage girls to work as prostitutes.

Schools Superintendent Wade Haun said in a statement that administrators had not cleared her in advance to speak at Kiona-Benton City High School.

Salsbury performed with a group of musicians who shared inspiring messages about overcoming negativity, peer pressure and other issues. Spokesman Ron Adams says the group was not aware she was a sex offender.

Benton County sheriff's Detective Mike Wilson says Salsbury turned herself in to authorities and was jailed on Wednesday — a day after the assembly.

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Information from: Tri-City Herald, http://www.tri-cityherald.com