One week after the Justice Department made its long-sought arrest in the nearly five-year-old Jan. 6 pipe bomb investigation, the case is already facing delays as prosecutors continue to withhold details about the suspect’s alleged motive and whether the bombs were tied to the Capitol riot itself.

Lawyers for the DOJ and 30-year-old defendant Brian Cole Jr. jointly asked U.S. Magistrate Judge Moxila A. Upadhyaya on Wednesday to postpone Cole’s detention hearing by 15 days, citing a “significant amount of discovery” that must be reviewed before the proceeding. The judge on Thursday granted the request to delay the hearing, originally scheduled for next week, until Dec. 30 at the request of both parties.