Erlan Baltabay, a leader of the Independent Oil and Energy Workers' Union in Kazakhstan, has been in prison since 16 October 2019.
The government of Kazakhstan has been the focus of a major international protest campaign which has the support of 5,252 trade unionists so far.
But the authorities are now attempting to fabricate another case against Erlan in order to keep him in jail, even though his first sentence was due to end next month.