Somyot yesterday said that a test of an audio clip in which Chuwong talks about the share transfer was a delicate matter and required high-tech tools, hinting the process would take time to complete.
He said it was up to the Crime Suppression Division to issue arrest warrants based on evidence.
An informed source at the division said it was likely arrest warrants would be issued for two or three suspects next week.
Following a previous police warning urging those involved in the transfer of the shares to contact police for their own safety, police spokesman Lt-General Prawut Thavornsiri said no one had sought police protection yet.
During the investigation, he said police were willing to provide security to Pol Lt-Colonel Banyin Tangpakorn, Kanthana and another share recipient upon request.