Two pillion riders suffer gunshot wounds in a violent police response.
The three men are believed to have been escorted by police to another city in Xinjiang.
The wife of Ilham Tohti says her young family now faces economic hardship.
Relatives carry the seriously wounded young man to protest in front of government offices.
A source claims the family is unable to follow briefings conducted in Mandarin.
His frank comments on religious controls and unemployment bring praise from Uyghur netizens.
A Uyghur is accused of killing the officer as he emerged from a meeting.
If deported home, the Uyghurs face 'credible threats of torture,' a human rights group says.
China is pushing for their deportation home where they could be punished.
Uyghurs who have made a life in southwestern China are uprooted and ordered back to Xinjiang.
Police are warning hotels in some areas not to admit 'guests from Xinjiang.'
Sources suspect they had been 'trapped' in Yunnan province after failing to flee the country.
The crowd is aggravated by dispute over confiscated motorcycles.
A rights group meanwhile warns that Ilham Tohti remains at high risk of torture and ill-treatment as long as he is in custody.
But little is known about the fate of his two business partners.
Chinese authorities inform their families of the charges against them.
Ilham Tohti could face a life sentence, but his lawyer says there is little evidence to support the charges.