Reading the verdict, the court reprimanded the pair for omitting to verify the information before holding a press conference to attack Constitution Court president Wasan Soypisudh on June 3, 2010.
The court said the pair had maliciously and falsely portrayed Wasan for lacking impartiality.
In addition to the suspended imprisonment, the pair will have to pay a fine of Bt50,000 and publish the summary verdict in three newspapers for seven days.
The Nation