A former McKinley Technology High School teacher was charged with second-degree theft on Thursday in connection with a $100,000 grant that D.C. school officials say vanished. Rick Kelsey was the director of STEM — science, math, engineering and technology — at McKinley when the national AARP awarded the Northeast high school $100,000 for its efforts to help senior citizens use the Internet in 2008.

Police records show that Kelsey was arrested at 10 a.m., charged, and was held overnight. Sources close to the D.C. Public Schools investigation say the charge relates to the AARP grant, which staff planned to use to further students’ assistance to senior citizens. The school system has been investigating the funds for more than a month.