Gangster Lawrence Bishnoi has admitted that he was the mastermind in Punjabi singer Sidhu Moosewala's killing and was planning it since last August, Punjab Police ADGP Pramod Ban said on Thursday. Shubhdeep Singh Sidhu, also known as Sidhu Moosewala, was shot dead in Punjab's Mansa district on May 29, a day after the Punjab government pruned the security cover of …