▁Times . ▁Tw enty - one ▁workers ▁were ▁killed ▁in ▁the ▁fire ▁which ▁followed . ▁ ▁Ot is ▁declared ▁the ▁bomb ing ▁the ▁" Cr ime ▁of ▁the ▁Century " ▁and ▁used ▁his ▁newspaper ' s ▁large ▁circul ation ▁to ▁wh ip ▁up ▁public ▁sentiment ▁against ▁un ions . ▁A ▁second ▁bomb ing ▁at ▁an ▁iron ▁works ▁in ▁the ▁city ▁on ▁Christmas ▁Day ▁w ors ened ▁the ▁h yst eria ▁in ▁the ▁city . ▁The ▁M & M ▁contributed ▁$ 5 0 , 0 0 0 ▁($ 1 . 1 ▁million ▁in ▁ 2 0 0 7 ▁dollars ) ▁to ▁a ▁city ▁effort ▁to ▁h ire ▁private ▁detect ives ▁to ▁track ▁down ▁the ▁perpet rat ors . ▁ ▁In ▁April ▁ 1 9 1 1 , ▁Ort ie ▁Mc Man ig al , ▁a ▁staff ▁representative ▁with ▁the ▁International ▁Association ▁of ▁Bridge ▁and ▁Struct ural ▁Iron ▁Work ers , ▁was ▁app reh ended ▁by ▁private ▁detect ives ▁in ▁Illinois . ▁Mc Man ig al ▁conf essed ▁to ▁bomb ing ▁the ▁iron ▁works ▁and ▁imp licated ▁the ▁union ' s ▁national ▁secretary - tre as urer , ▁James ▁B . ▁Mc N am ara , ▁and ▁his ▁brother , ▁John ▁J . ▁Mc N am ara , ▁in ▁the ▁Times ▁bomb ing . ▁ ▁The ▁American ▁Federation ▁of ▁Labor ▁( AF L ), ▁Eug ene ▁Deb s ▁and ▁others ▁r al lied ▁to ▁the ▁defense ▁of ▁The ▁Mc N am ara ▁Brothers . ▁The ▁brothers ▁were ▁def ended ▁in ▁court ▁by ▁f amed ▁att