Authorities have said they have one suspect in custody, but have released no other information. Calls from NTD were diverted.
[Someone from Yanta Branch of Xi'an Public Security Bureau]:
"We can't accept interviews, it's impossible to disclose any specific information."
Jiang was an operator of a dairy company in Shaanxi province. In 2006 he reported that local dairy companies were putting dangerous chemicals in their milk products. He was ignored until 2008, when it came clear that at least six babies had died and 290,000 others suffered kidney damage from melamine-tainted milk powder.
Unconfirmed reports from Chinese media claim that paid killers murdered Jiang. When the melamine milk scandal first broke there were rumors that he had a 500,000 yuan, or $80,275 USD, price on his head.
The toxic milk scandal sent shockwaves throughout China. Many dairy companies were shut down. Even the state-owned Sanlu dairy company was found to be one of the 22 firms adding melamine.
China's Toxic Milk Whistleblower Murdered --NTDTV.org