Overview
On the night of September 30–October 1, 1910, a suitcase containing sixteen sticks of dynamite was left in "Ink Alley," a passage between the Los Angeles Times Building and its printing annex. The device, rigged to a windup clock and electric battery, detonated at 1:07 a.m. on October 1, 1910. The blast ignited natural gas piped into the building and started a fire that collapsed part of the structure. Of roughly 115 people inside, 21 died, most in the fire, and more than 100 were injured. Similar unexploded bombs were found the same morning outside the homes of Times publisher Harrison Gray Otis and Merchants and Manufacturers' Association secretary Felix Zeehandelaar.
Background and investigation
The bombing occurred amid a bitter Los Angeles labor dispute: the International Association of Bridge and Structural Iron Workers (IW) was engaged in a citywide strike against open-shop employers, and had for several years conducted a broader campaign of bombings against non-union iron works nationally. Private detective William J. Burns was hired by the City of Los Angeles to investigate. Using an informant inside the union and undercover surveillance, Burns identified James B. ("J.B.") McNamara and his brother John J. ("J.J.") McNamara, an IW secretary-treasurer, as suspects, along with Ortie McManigal. On April 14, 1911, Burns and police arrested McManigal and J.B. McNamara in Detroit; J.J. McNamara was arrested on April 22, 1911, during a raid on IW headquarters in Indianapolis. McManigal signed a confession implicating the McNamaras and others.
Legal proceedings
The McNamara brothers were arraigned May 5, 1911, and initially pleaded not guilty, becoming a rallying cause for the American labor movement, with attorney Clarence Darrow leading their defense. As jury selection proceeded and evidence mounted, plea negotiations occurred involving Otis and Times executive Harry Chandler. On December 1, 1911, the brothers changed their pleas to guilty. James B. McNamara admitted to placing the bomb that destroyed the Times Building and expressed regret that people had died; he was sentenced to life imprisonment. John J. McNamara admitted to ordering a separate bombing of the Llewellyn Iron Works and received a fifteen-year sentence. Related federal prosecution in Indianapolis in 1912 resulted in convictions of 38 of 40 remaining defendants on federal dynamite-transport conspiracy charges. Two additional men connected to the Los Angeles bombings, David Caplan and Matthew Schmidt, were arrested in 1915; Schmidt was convicted of murder in December 1915 and given life imprisonment, while Caplan was convicted of second-degree manslaughter in December 1916 and sentenced to ten years.
Aftermath
James B. McNamara died of cancer in San Quentin State Prison on March 9, 1941. John J. McNamara, released after nine years, later returned to union organizing, was convicted in a separate matter, and died in Butte, Montana, on May 8, 1941. The bombing and its prosecution had lasting effects on the Los Angeles labor movement, which saw significant membership losses in subsequent years.