He said if Kritsuda, who is in self-imposed exile, issued another video to counter his allegation he would make public further evidence against her.
He said that would be on top of transaction slips and other documents indicating the money transfers that were found at her Chon Buri home.
Somyot denied he had stated publicly that the Pheu Thai-linked United Front for Democracy Against Dictatorship (UDD) was involved with the violent protests in 2010.
He repeated that the five people suspected of being men in black had not been linked to the murder of Colonel Romklao Thuvatham.
The Royal Thai Police chief was speaking after core UDD leaders met him on Thursday in an attempt to distance themselves from the men in black.