Lese majeste defendant Somyot Prueksakasemsuk has submitted an 18-page closing address to the Criminal Court ahead of the long-delayed ruling scheduled for Wednesday.
Mr Somyot was arrested on April 30, 2010, near the Thai-Cambodia border on charges the Voice of Taksin magazine, which he published, carried two articles which constitute lese majeste.
In his statement, Mr Somyot argued he should not be found guilty because the Print Act 2007 said writers, not editors, should be held as the prime offenders in lese majeste cases.
Since the authors of the two offending articles, written under the pseudonym Jit Polachan, were not included in the lese majeste lawsuit, the articles did not violate the law, Mr Somyot said.
Mr Somyot also argued His Majesty the King had declared in one of his birthday speeches that he did not object to criticism by his subjects.
Karom Polpronklang, Mr Somyot's lawyer, said the closing statement was sent to the court early last week.
Protests against the former editor's detention have been organised overseas in the past year.
International human rights organisations including Freedom House and Amnesty International also sent out global appeals on his case.
The United Nations Working Group on Arbitrary Detention found Mr Somyot was detained arbitrarily twice _ first for 19 days in May-June 2010 and then for 72 days after he was arrested on April 30 before being officially charged in July.
Last week, 381 of Mr Somyot's supporters submitted an open letter to Prime Minister Yingluck Shinawatra, the justice minister and the National Human Rights Commission demanding his release. Amnesty International Thailand on Friday declared Mr Somyot a "prisoner of conscience" and urged its members to start a writing campaign to support his release.
Mr Somyot has been denied bail 12 times, with the most recent request made on Jan 8.