I suppose they will return to DNA testing farangs getting off of planes at Swampy at the start of their holidays, just in case it was one of them.
However, the fact that the two of them were seen arguing with a local lad earlier in the night is most likely at the root of this. So many times a Thai man (singular) who feels his honour has been insulted, has gone and got some friends to "teach the farang a lesson". The fact he was hanging about a bar means that someone will know who it is, he is likely local to the area, and probably connected to the chickenheads who are pretending to investigate it.
From the BP article
http://www.bangkokpost.com/news/loca...-narrowed-downSurat Thani police commander Pol Maj Gen Kiatipong Khaosam-ang said a man caught by a surveillance camera near the crime scene was a worker at an entertainment place and the supervisor of a suspect whom...
I wonder if this is the mortally offended local guy?