Activist Andy Hall has gotten one of four criminal and civil cases against him dismissed in a Thai court on Wednesday, according to BBC.

Hall is a British human rights activist who helped author a report last year for the Finland-based watchdog Finnwatch that detailed what it said were poor labor conditions in seafood and pineapple export companies in Thailand, Reuters reported.

The judge said the case was dismissed on Wednesday because the interview took place in Myanmar and the office of Thailand's attorney general was not involved into the investigation as required by law, according to Reuters.

The four cases against him were both criminal and civil defamation cases by a Thai fruit processing company that he accused of "mistreating" its workers, migrant ones especially, according to BBC. The trial for the other three cases begins Thursday .

The report Hall helped investigate was about a factory owned by Natural Fruit that employed hundreds of migrants from neighboring Myanmar, Reuters reported.

Migrants, largely from Myanmar and Cambodia, work in Thailand and most do not have legal papers, and must take low-skilled jobs with no health and social security benefits for long hours at pay below their Thai counterparts, according to BBC.

The report says the company illegally confiscated passports, paid below minimum wage and overworked staff in sweltering conditions so hot that heat strokes were common,the Bangkok Post reported. Natural Fruit disputes the accusations.

Hall has worked in Thailand for years and is an outspoken activist on migrant issues, according to BBC.