(CBS/AP) BANGKOK - A 62-year-old Thai man who became known as "Uncle SMS" after he was convicted of defaming Thailand's royal family in text messages died Tuesday while serving a 20-year prison term.
The case of Amphon Tangnoppakul, who had suffered from mouth cancer, drew attention to Thailand's severe lese majeste law last November when he received one of the heaviest-ever sentences for someone accused of insulting the monarchy.
As news of his death spread, about 40 demonstrators gathered outside Bangkok's Central Criminal Court holding signs denouncing the royal defamation law and holding leaflets saying "Uncle is dead. Who killed him?"
His wife, Rosmalin Tangnoppakul, learned of his death while trying to visit him Tuesday at the Bangkok prison where he was held. Friends later consoled her at a prison reception area while she burned an incense stick and prayed.
"Amphon Tangnoppakul, you can come home now," she said. "You're free now. Come home!"
The cause of Amphon's death early Tuesday was not immediately known, but he had complained of stomach pains on Friday and was transferred to a correctional department hospital, his lawyer Anon Numpa said. Officials planned an autopsy on Wednesday, the lawyer said.
Amphon, a retired truck driver, was arrested in August 2010 and accused of using a cellphone to send four text messages to a government official that were deemed offensive to the queen. He denied sending them and said he didn't even know how to use the SMS function on his telephone to send texts.
He wept during his court proceedings, saying, "I love the king."
The country's lese majeste law provides for a jail term of three to 15 years for anyone who "defames, insults, or threatens the king, the queen, the heir-apparent, or the regent." Amphon's sentence was believed to be the heaviest ever received in a lese majeste case because of additional penalties issued under a related law, the 2007 Computer Crimes Act.
Opponents of the lese majeste law - known as Article 112 - have been seeking its reform or abolition, but have met with fierce opposition from royalists.
"[Amphon] was the victim of this draconian law, Article 112," said Suda Rangkupan, a Chulalongkorn University lecturer and member of the group Friends of Thai Political Prisoners. "And we also want to show ... to the Thai court, that this death was caused by injustice in Thailand."
Before his arrest, Amphon had lived with his wife, daughter-in-law and three grandchildren in a rented room in Samut Prakan province, on the outskirts of Bangkok.
Last year, Thailand sent an American, Joe Gordon, 55, to prison for two and a half years for defaming the country's royal family after he translated excerpts of a banned biography of Thailand's king and published them online. He had been living in Colorado at the time.
Also last December, journalist Daranee Charnchoengsilpakul, who had been detained for three and a half years after speaking at a rally using impolite language that was recorded by police, was found guilty of violating the lese majeste law and sentenced to 15 years in prison for insulting Thailand's king.
Daranee said she would not appeal her sentence. "I have no will to keep fighting and I will neither lodge an appeal nor seek a royal pardon," she said.