HOUSTON – A former employee of the Houston Independent School District agreed to plead guilty Thursday in connection with her involvement in the college admissions scandal that rocked the country last year, according to a release from the U.S. Attorney’s Office. Niki D. Williams, 46, will plead guilty to one count of conspiracy to commit wire fraud and mail fraud and honest services wire fraud and mail fraud, officials wrote in the release. RELATED: How prosecutors say Niki Williams is involved in college admissions scandalWilliams administered the SAT and ACT tests at the high school in Houston where she worked. Williams then returned the falsified exams to the ACT and College Board for scoring, officials say. Singer, Riddell and Fox have all previously pleaded guilty to the charges they faced and are cooperating with prosecutors, officials said.