Former House Democratic staffer Jackson Cosko has been ordered held without bail ahead of his pending trial for doxxing GOP senators. He has been accused of posting the personal information of a Republican senator online. Cosko has been charged with several federal and local crimes in the District of Columbia.

Cosko was arrested Oct. 3. The 27-year-old is accused of using his work login to post private information about Sen. Mike Lee, R-Utah, from a computer in a House of Representatives office. Other charges against Cosko allege that he illegally accessed a computer in the office of Sen. Maggie Hassan, D-N.H., and that he threatened an employee of that office who discovered him there. He has pleaded not guilty to the charges.

The purported home addresses and phone numbers of Lee, Sen. Lindsey Graham and Sen. Orrin Hatch were posted to their respective Wikipedia pages. The edits were tracked and recorded by a Twitter bot that monitors changes made to Wikipedia entries by anyone located in the US Congress. The incident occurred during the Sept. 27 Senate Judiciary Committee hearing regarding Supreme Court nominee Brett Kavanaugh and the sexual assault allegations against him.

Cosko was working as a staffer for Rep. Sheila Jackson Lee, D-Texas, prior to his arrest. He had previously worked with Sen. Hassan and former Sen. Barbara Boxer of California. He also worked or interned with the office of Sen. Dianne Feinstein, D-Calif.

Federal prosecutors submitted a ten page document asking that Cosko be kept in custody. In the document, they said a search of Cosko’s apartment found evidence that he planned to dox other lawmakers. Prosecutors also released photos taken by police during the search of his apartment. US Magistrate Judge Deborah Robinson said in her decision that prosecutors had shown that no conditions could ensure the community’s safety if the suspect was released.

A trial date for Cosko has not yet been set. If found guilty on all of the charges, Cosko could face over 48 years in prison.