They were criminals scamming relatives of the recently deceased into signing waivers authorizing organ "donations". They were found out and arrested.

The propaganda line pushed by the US and Falun Gong is that Chinese government directly sponsors this kind of thing along with harvesting them from live political prisoners. Theres no actual proof of any of this outside hearsay and wild speculation.

If this shit does happen, it's criminal and happens off the books by bad actors, usually scammers or black marketeers. This isn't something unique to China.