An unclassified document from federal investigators shows forensic findings and analysis of a pair of pipe bombs planted blocks from each other outside the headquarters of the Democratic and Republican parties in Washington, D.C., and discovered by authorities on Jan. 6., the day of the U.S. Capitol riot.

The “Quick Look Report” by the National Explosives Task Force, obtained by CBS News, offers the most in-depth look at the internal components of the explosive devices that authorities believe were planted the night before the attack on Congress by a suspect who, to this day, eludes capture. The FBI is offering $100,000 in reward money for information leading to the location, arrest, and conviction of anyone involved in the placing of the bombs, which were safely detonated at the scene by robots, according to CNN.