In reality, Rajapaksa leads a country where thousands are held without charge or trial under a draconian law, and thousands more have simply disappeared.
Commonwealth leaders will be meeting in a nation with 5676 "outstanding cases" of disappearances, according to the United Nations - the highest number in the world besides Iraq.
Manuel has no doubt that the security forces abducted her son in Mannar on September 11, 2008.
"There is an army and a navy camp nearby and many checkpoints along the way," she said. "It's impossible that it could have happened without the soldiers at the posts knowing. From my perspective, it was the military who have done this."
She added: "I believe that my son is under the custody of the Government."
Anton Manuel disappeared in the final months of Sri Lanka's bloody civil war, when the Liberation Tigers of Tamil Eelam (LTTE) were fighting for a separate homeland for the Tamil minority. Anton Manuel is a Tamil, but his mother insisted that he was not a rebel, although she conceded that he probably gave food and petrol to the LTTE. "That's what the entire village did. If that's the reason for arresting him, then the army has to arrest the entire village."
Her search for her missing son has taken Manuel to prisons across Sri Lanka. In 2010, a government minister wrote an official letter stating that Anton Manuel was inside Boosa detention centre in the south. She duly travelled almost 500km there, only for the prison authorities to deny any knowledge of her son. One official reminded Manuel that a parliamentary election was imminent, adding: "The minister wants your support. Lots of people have these letters."
After her hopes were raised and dashed, Manuel persisted. "I would know if he was dead; I am his mother. I would know inside me," she said.
Today, she can travel freely in a country at peace. Rajapaksa ended 26 years of civil war by crushing the LTTE in a decisive battle in 2009. But the disappearances did not end with his victory.
Two days before the President was re-elected in 2010, a 50-year-old journalist was leaving his office in Colombo. Prageeth Eknaligoda's newspaper was often critical of the Government. He had recently written an article entitled "Why we should not give another term to Rajapaksa". After that, he was tailed by men whom he believed were state agents.
"He knew that some people were following him and he said to a friend 'if you give me a pencil and paper, I can draw the face of the man who is following me'," recalled his wife, Sandya.
On January 24, 2010, he left work as usual at 7.30pm. The only clue to his fate was provided by a taxi driver who often drove him home. On that night, he rang to ask if the journalist needed a lift, but Prageeth Eknaligoda declined the offer, explaining that he was already in a car. Just before he hung up, the taxi driver heard the journalist say: "But this is not the right way". Nothing has been heard of Prageeth Eknaligoda since. "At about 9.30pm I called him, but his phone was switched off," said his wife. "I tried calling him until the morning, but the phone didn't work."
As for who abducted her husband, Eknaligoda has no doubt. "The present Government is behind this," she said. "First we suspected they were behind this, but now we are sure because of their behaviour."
No effort has been made to investigate the disappearance and Eknaligoda has been told that powerful figures were offended by the article. She believes that no one else had a motive for the kidnapping.
"If some criminals did it, they would have asked for money to release him. This has not happened," she said.
Like Manuel, she lives in hope that she will see her loved one again. In his first Independence Day speech after the war, Rajapaksa said: "I am entrusted with the task of uniting the hearts of all sections of our people. I willingly take over the noble task of creating peace." He duly began an ambitious campaign to rebuild northern Sri Lanka, much of which had been under LTTE control. About US$3.2 billion ($3.8 billion) has been invested, far more than the amount spent on new infrastructure anywhere else in the country.
But Northern Province remains dotted with military bases - the Daily Telegraph counted 51 in four days - and the new roads and hospitals carry posters paying homage to the President. One billboard in Jaffna, the provincial capital, shows a beaming Rajapaksa alongside the slogan: "You are the sun and the stars and forever you will be the President. Live forever!"
Meanwhile, Tamils bitterly recall how the civil war's final battle saw the army corral 330,000 civilians on the beach at Mullaitivu, pounding the area with heavy artillery. The LTTE shot anyone who tried to flee, leaving no escape route. About 40,000 people were killed in just 16 weeks in what the Government officially called a "humanitarian operation".
When the war ended, Rajapaksa repealed the emergency regulations in force since 1983. But he kept the Prevention of Terrorism Act, originally passed as "temporary provision" in 1979, allowing the regime to detain anyone without charge or trial for 18 months.
In January, the army raided a home in Northern Province and took away a 33-year-old man on suspicion of hiding weapons. "They beat him up and they covered his eyes in black cloth," said the man's aunt. "They kept beating him up and taking him from place A to place B, screaming at him 'where are the weapons'. But there were no weapons to show."
The man has not been charged or brought before a court. Under the act, the Government can keep him behind bars simply by signing a new detention order every three months.
The authorities have not revealed how many people are being held under this law, but independent estimates suggest a figure in the thousands. Now Human Rights Watch and Amnesty International have joined forces to demand an international inquiry into the disappearances.
Neville de Silva, the Sri Lankan Deputy High Commissioner in London, said the Government had established its own inquiry into missing people in August.
"There is an official body that is looking into these cases," he said. "Disappearances don't necessarily mean they are in the country. They could have left by boat or by other means. So it's not a simple matter to locate them. Documents are often not available, people tend to change their names. It's not a simple process; it's one that takes time."
Manuel has almost given up hope of speaking to her son again. She only wants to know that he lives, and to set eyes on him. "The only request that we have for the Government is if our children are alive, we just want to see them from afar," she said. "All we want is to see our children from a distance."
