<p>Gangster Lawrence Bishnoi, the mastermind in the Siddu Moose Wala murder case, was brought to State Special Operation Cell (SSOC) in Amritsar, Punjab on June 28. </p>.<p>It was learned that Lawrence Bishnoi was running a racket of extortion from singers in Punjab. Sidhu Moose Wala was shot dead by unidentified assailants in Jawaharke village of Punjab's Mansa district on May 29.<br /> </p>