More than 100 people appeared in court accused of taking part in a massive criminal ring that trafficked Rohingya refugees from Myanmar through Thailand and to Malaysia.
Sixty-two of them were convicted on charges of human trafficking and other offenses.
The case is the result of the grisly discovery in 2015 of a mass grave in the jungles between Malaysia and Thailand
, which led to the exposure of the smuggling and exploitation operation.
Beginning in 2012 amid sectarian violence
in Myanmar's Rhakine state, tens of thousands of Rohingya, a long-oppressed ethnic minority not recognized by the government, began fleeing the country.
Many Rohingya with the means to leave Myanmar did so by perilous sea journey. Smugglers carried them out on small boats to cargo ships, mostly bound for Malaysia. However, many neighboring countries refused to take them in, leading to a major humanitarian crisis
Some who did not make it out to sea were even less fortunate, trapped in squalid jungle prison camps run by smugglers, who prevented them from leaving while demanding extra payments from their families back home.
More than 25 bodies were discovered in a mass grave
near such a camp in southern Thailand's Songkhla province in May 2015, leading to a major crackdown on people smuggling in the region and dozens of arrests.
Those accused of taking part in the human-trafficking operation range from local administrative staff and civilians to high-ranking military officials.
The years-long probe into the case with as many as 80-plus police detectives at one point finally ended in court Wednesday.
Concerns that justice would never be reached were compounded when the lead investigator sought asylum in Australia in 2015, saying that death threats had caused him to flee Thailand
Speaking Wednesday from Australia, Maj. Gen. Paween Pongsirin told CNN the investigation "has just started, there are many more higher-up officials involved in this ring."
Paween, who said he was at the final stages of applying for asylum in Australia, expressed sadness for how much corruption there was in Thailand.
In a statement
, Bangkok-based human rights organization Fortify Rights praised the trial as an "unprecedented effort by Thai authorities to hold perpetrators of human trafficking accountable."
"(However), the trial was beset by unchecked threats against witnesses, interpreters, and police investigators," the group warned, adding "Thailand has a long way to go to ensure justice for thousands who were exploited, tortured, and killed by human traffickers during the last several years."
The judge began reading verdicts for the more than 100 suspects at about 8.30 a.m. local time and did not finish until more than 12 hours later as he detailed the roles of each defendant in the smuggling ring.
They ranged from transporters to financiers, from agents to guards, and those overseeing everything.
Due to the number of people being tried, the defendants listened to the verdict from prison.
Those found guilty Wednesday can still appeal their cases to the Court of Appeals and then Supreme Court.
CORRECTION: An earlier version of this story incorrectly reported the number of people convicted. It is 62.