When the Los Angeles Times building was blown apart by a bomb at 1 AM, the kind of people who had planted it was fairly easy to guess. The Times had been crusading against organized labor, particularly the Iron Workers union, which had a history of bombing their opponents. Additionally, the publisher of the Los Angeles Times, Harrison Gray Otis, and the head of the Merchant and Manufacturers' Association, Felix Zeehandelaar, had bombs planted at their houses. Still, nailing down the specific identification of the bombers was difficult. This changed because James J. MacNamara, John B. MacNamara, and Ortie McManigal, all leaders among the Iron Workers, confessed to an undercover agent for the Burns Detective Agency. Despite the peculiarities around the men's arrest, which took place in Detroit, the trial began in Los Angeles in April of 1912. The labor movement got behind the MacNamaras, except for their lawyer, Clarence Darrow. With McManigal having turned state's evidence and the consistent bragging of the MacNamaras, Darrow convinced the two to plead guilty. Yet the case turned as Darrow was charged with jury tampering. All in all, the MacNamaras went to jail, Darrow was disgraced, and the labor movement was set back because some of their own had bombed the Los Angeles Times building.