The Supreme Court today upheld 20-year imprisonment sentence for former media tycoon Sondhi Limthongkul and two colleagues after finding them guilty of corporate frauds.
Two other colleagues sentenced to 20 years in prison are Ms Sawalak Tiranujanyong, and Ms Yupin Chanthana.
Another colleague who was director also of The Manager Media Group Suradej Mukayangkul was sentenced to two years and six months in prison.
The court also rejected their pleas for probation.
Sondhi, founder of the yellow-shirt People Alliance for Democracy was later escorted by security guards to Bangkok Remand Prison to serve his sentence.
Sondhi has been jailed after an appeal court refused him bail for a 20-year sentence for corporate fraud.
Sondhi Limthongkul, who led protests which helped trigger a 2006 army coup that toppled then premier Thaksin Shinawatra and plunged Thailand into a near-decade of political turmoil, was sentenced in 2012 but freed on bail, According to ABC News Australia.
The Appeal Court upheld his conviction and refused him bail after his lawyer asked for a Supreme Court adjudication.
His conviction is for violating the Securities and Exchange Act in a case dating back to the mid-1990s.
He has been sentenced in 2012 for falsifying documents used as collateral for a loan of almost 1.1 billion baht for his ASTV/Manager media.
Source: Thai Public Broadcasting Service (Thai PBS)