On Wednesday evening, U.S. Capitol Police arrested Jackson Cosko -- a Democratic congressional staffer and party operative who is alleged to have doxxed several Republican senators and posted their posted their personal information online. The 27-year-old Cosko stands charged with publicizing restricted personal information, witness tampering, threats in interstate communication, unauthorized access of a government computer, identity theft, second-degree burglary and unlawful entry. He may face further charges.
Most recently, Cosko worked for Rep. Sheila Jackson Lee (D-TX). He has also worked for Sen. Maggie Hassan (D-NH) and former Sen. Barbara Boxer (D-CA). Lee sit on the House Judiciary Committee. A person who was employed by Hassan was suspended for shouting “F**k you!” at President Trump recently.
The home addresses of Senate Majority Leader Mitch McConnell in Kentucky and Washington D.C. were added to the senator’s public Wikipedia page. In addition, the home and email addresses, home phone and cell phone numbers of Sens. Lindsey Graham (R-SC), Orrin Hatch (R-UT) and Mike Lee (R-UT) were also made public on Wikipedia. This came while the Senate Judiciary Committee questioned Supreme Court nominee Brett Kavanaugh over allegations made by Dr. Christine Blasey Ford that he had sexually assaulted her in the 1980s. The above-mentioned Republicans have seriously questioned the veracity of Ford’s accusations.
Soon after the senators were doxxed, an IP address used was connected to the Capitol. That the information was made public was first discovered by a Twitter bot that automatically tracks any changes made to Wikipedia entries from anyone located in the U.S. Congress and publicizes them on the site. Later, the bot deleted the tweets because the edits contained personal information. According to the bot, the person posting the restricted information did so from a House of Representatives computer. The senators’ information was sent to thousands of people.
Cosko calls himself a “Democratic Political Professional” with cybersecurity expertise. According to a U.S. Capitol Police statement, Cosko allegedly “posted private, identifying information (doxing) about one or more United States Senators to the internet.” The statement said the “investigation will continue and additional charges may be forthcoming.”
As his top work entry, he lists “United States Senate,” and states that he was a legislative correspondent and systems administrator from January 2017 through May 2018 in the Washington D.C. area. A letter from Rep. Jackson Lee indicates that he was working for her as late as September 2018. For an earlier position, he noted on LinkedIn: “Assist senior staff with issues before the Commerce Committee including technology, telecommunications, transportation; as well as with cybersecurity matters before the Homeland Security Committee.”
Cosko also worked for seven months as a press assistant and systems administrator for the Senate from July 2016-January 2017 on issues relating to “technology, cybersecurity, space, science, and telecommunications.” He also worked for progressive political organizations. He was a “lead field organizer” for Generation Forward Pac in Iowa from July 2015 through November 2015, and as a volunteer for Change Inc. as a “community development specialist/case manager” in Washington D.C. on “poverty alleviation” in 2012-2014. He also spent time as an intern with the U.S. House of Representatives in 2012 and 2013. He noted that he: “Assisted in planning and execution of fundraising, campaign, and other special events. Conducted research on impact issues and drafted press releases, letters to level government officials and agencies, as well as conducted social media campaigns in order to capitalize on earned media. Maintained databases of important media, donor, and constituent contacts for media/campaign efforts.”
In 2011, he was also an intern for the U.S. Senate. He listed his job duties as: “Attended Congressional hearings and briefings, conducted background research on salient political issues, and provided concise analyses and policy recommendations. Responded to constituent phone calls, letters, and requests. Provided constituents with case work assistance, advocating with Federal, state, and local government agencies. Supported executive assistant and scheduler with curating daily schedule of the Senator.”
On LinkedIn, Cosko wrote that he is studying toward a master’s of engineering degree from George Washington University in the field of cybersecurity policy and compliance. He lists Burlingame, California, as his hometown.
NEW: Capitol Police have arrested a suspect who they beleived doxed GOP Senators During the Kavanaugh/Dr Ford hearing last Thursday: pic.twitter.com/XOrociUoex— Frank Thorp V (@frankthorp) October 3, 2018