National deputy police chief, Pol Gen Sivara Rangsipromnakul, said Monday that the groups’ activities might be deemed a breach of the public gathering law and order of the National Council for Peace and Order.
He also questioned the groups’ legal right to lodge complaints with the police at Dusit district where the plaque was embedded at the Royal Plaza.
“Do they own the plaque? Or the plaque their private property?,” asked the deputy police chief, adding that the police would launch an investigation to locate the missing plaque if any of the activist groups could prove that they are the rightful owner of it.
The original plaque mysteriously went missing and was replaced by a new one with new wordings.
On Monday, a group who claimed to be students announced in its Facebook page urging supporters to show up at Dusit police station at 9 am on Wednesday to collectively file a complaint with the police to demand the return of the plaque.
Former Pheu Thai MP Watana Muangsook, meanwhile, claimed that the plaque was a state property.
Writing in his Facebook page, Watana said he felt disgusted with the conduct of Pol Gen Sivara who questioned the right of activist groups’ demand for the return of the missing plaque.
The outspoken ex-MP claimed that the plaque was an archaeological object with historical significance as it symbolizes major political change in the country from Absolute Monarchy to Constitutional Monarchy.
Those who stole the plaque committed thievery liable to criminal litigation, he said, adding that the police should thank the groups for demanding the return of the object.