Surachai told DVB that migrant fishermen are frequently threatened by Thai authorities and bosses if they raise their concerns.
A legal adviser at the Burmese embassy in Bangkok told DVB that the prosecution team had requested yet another extension – this time until 23 January 2018.
Five Burmese migrant workers are suspected of killing four members of a Thai family, including a 5-year-old child, over an unpaid debt.
Thailand and Burma have agreed to set up a joint working committee to solve labour problems arising from confusion over Thailand’s tough new migrant worker rules.
Malaysia has some two million registered migrant workers but also an equal number of undocumented ones.
More than 1,000 Burmese migrants have returned via the Maw Taung border checkpoint in Tenasserim, with perhaps a similar number crossing at Kawthaung, the southernmost port in Burma.