 Sources described these charges as three murders, 12 attempted murders, heroin trafficking, illegal gambling, arson, extortion and robberies that stretched from Manhattan into Brooklyn and Queens.They've also been said to be located in parts of Canada and Australia.The Institute for Scientific Analysis has findings that "indicate that Asian gangs first emerged when a large pool of Chinese immigrant youths who arrived in San Francisco in the late 1960s were forced into self reliance by the city's failure to recognize the needs of its newcomers.