New Delhi, Oct. 24 -- The "Sigma & Company" gang gained widespread notoriety on September 26 after gunning down a former chief of the Brahmarshi Sena at his residence in Bihar's Dumra and then issuing a note, titled "Nyaya, Sewa, Sahyog (justice, service, cooperation)", stating "eight crimes" committed by the victim that warranted his murder, police said. They also called up journalists and "boasted" about how they defeated a casteist and corrupt leader, and were upholding justice, they said. Since July, they are suspected to be responsible for at least five murders, police said, adding that the gang was relatively smaller and had 12 members. While they usually escaped to Nepal after a crime, the murder of the Sena chief raised the heat. On...