The ten were only charged with plotting to act as undeclared foreign agents.
VOA: special.2010.07.10
Bounty hunters act as unofficial law enforcement agents.
VOA: special.2009.08.24
They were charged only with conspiring to act as unregistered foreign agents.
VOA: standard.2010.07.09
The Foreign Agents Registration Act (FARA) requires any agent of a foreign principal - including agents of foreign states, political parties, corporations, non-governmental organizations and even individuals - to register with the U.S. Department of Justice as a foreign agent.