From The Washington Post:
Years before prosecutors say he illegally financed an election effort for Mayor Vincent C. Gray, a local businessman allegedly secretly spent hundreds of thousands of dollars on behalf of at least seven other candidates for mayor and the D.C. Council, according to several people familiar with the payments.
Jeffrey E. Thompson, who is under federal investigation for allegedly financing a $653,000 secret campaign for Gray in 2010, allegedly made similar expenditures dating back to at least 2006, according to two people with direct knowledge of the payments who spoke on the condition of anonymity because the investigation is ongoing.
http://www.washingtonpost.com/local/dc-politics/more-dc-campaigns-allegedly-received-secret-funding-from-thompson/2013/08/11/c1340ea0-ffae-11e2-9711-3708310f6f4d_story.html