Cosko had been working for Rep. Shiela Jackson Lee as an intern and has subsequently been fired. This information was confirmed by Jackson Lee's chief of staff.
A Democratic aide on Capitol Hill faces five federal charges connected to maliciously publishing the private information of senators on the Internet. The personal information of three Senate Judiciary Committee Republicans was posted during the panel's hearings on Supreme Court nominee Brett Kavanaugh last Thursday.
Jackson A. Cosko, 27, most recently worked for Rep. Sheila Jackson Lee, D-Texas, and was formerly on the staffs of Sen. Maggie Hassan, D-N.H., and Sen. Barbara Boxer, D-Calif.
He has been charged with five federal counts and two counts under Washington, D.C., law in relation to the "doxing" of "one or more" lawmakers, according to a US Capitol Police news release. The charges include counts of witness tampering, identity theft, second-degree burglary, and unlawful entry.
Although a Capitol Police spokeswoman would not provide any additional details regarding who Cosko allegedly "doxed", his arrest followed the posting on Wikipedia of personal details, including home addresses and phone numbers, of Republican Sens. Lindsey Graham, R-S.C., and Mike Lee and Orrin Hatch, both of Utah.