And the violence threatens the old order, in which established, more predictable Chinese gangs provided protection for businesses.

The Chinese gangs especially rely on their relationship to certain large, established social and political associations.

The Chinese gangs, he said, are moving into the trade partly because of their need for low-level members to help run the heroin business.

Can it be true that some Chinese gang are really trying to recover the diamonds?

Chinese gangs have existed as a low level activity for at least 20 years.

In 1985, capping a 10-year investigation, federal authorities announced their first prosecution of Chinese gangs.

But officials say many are controlled by Chinese gangs, known as triads.

The threat of Chinese gangs is controlled by holding about 1,000 suspected gang members in detention without trial.

The case soon leads them to a Chinese gang and a black market of immunodeficiency medicinal drugs.

Some are controlled by Chinese gangs, or the military.