Updated at Share This IDAHO FALLS — A retired FBI agent says prosecutors and investigators have done a good job “putting together the puzzle pieces” that led to murder charges against Chad and Lori Daybell. Frank Montoya worked for the FBI over 25 years and served in a variety of high-profile positions, including the head of national counterintelligence and as the special agent in charge of the Honolulu and Seattle divisions. Montoya oversaw counterintelligence squads and led several national security investigations but says he has never seen a case like the Daybells. “The indictments really illustrate how this complex case, with all these twists and turns, just how intensive, time-consuming and difficult it can be to put everything together,” Montoya tells EastIdahoNews.com. “It was a painstaking, lengthy process but they needed to put together all the pieces.”