The case in China's Shaanxi province caused an uproar after photos of the mother and dead baby were circulated online, embarrassing the government, which later suspended three local officials.
The officials had forcibly aborted the wife's late-term pregnancy earlier this month because it violated China's tough one-child policy.
Deng Jicai, a sister of the 30-year-old father Deng Jiyuan, said Tuesday that the local government has organized a backlash against the family, calling them traitors and keeping them under surveillance.
She says a man beat up Deng Jiyuan when he tried to travel to Beijing to speak to reporters.