evidence: Here are the 9 lawmakers investigating the Jan. 6 Capitol attack The House select committee investigating the deadly attack on the U.S. Capitol on Jan. 6 will hold the first of a series of hearings on Thursday about what it has learned over the course of its 10-month investigation. [...] Aguilar told the media on July 1 that the focus of the investigation is to uncover the truth. "One-hundred forty Capitol Police officers were injured, some of them permanently, [on Jan. 6]," he said.