Well .. I know that in some jurisdictions, if a person has been told they are under arrest; they can no longer be taking pictures of the officers.
And .. in other jurisdictions, if you have told a person they are under arrest; an officer is allowed to tell untruths to the arrested person.
Just the same as when a person is being interviewed for possible connection to a crime at a police station; there is no obligation of the police to be truthful to the person being interviewed.
We may hot like it .. but it’s usually for the purpose of getting the interviewee to admit to complicity in a crime, or knowing of criminal activity.
It’s actually the most widely adopted police interrogation method nowadays, to explicitly lie to suspects and tell them that you have all sorts of evidence against them that you don’t have.
It’s called “The Reid technique”:
https://en.wikipedia.org/wiki/Reid_technique