I’m not 100% sure whether this policy remains under Jeff Sessions but I haven’t heard of any changes. The policy doesn’t cover interviews with people who haven’t been arrested and there are exceptions even after arrest so FBI notes can still be important.
The FBI agents would argue record interviews might cause witnesses and suspects to be less forthcoming. After all, the absence of video or audio recordings also allows the suspects to claim the FBI notes misrepresent what they said. Suspects can choose to speak only if they are not recorded, but let’s face it, that will only happen if the FBI agent tells them it’s an option or if the suspect is particularly strong willed and realizes that not having any obligation to speak also means he or she can consent to speak only if not recorded. I don’t know what happens if the FBI surreptitiously records a conversation that was not supposed to be recorded. My guess is that the evidence would still be admissible.
IANAL - As I understand it, lying to police is obstruction of justice if it is done to mislead or misdirect an investigation. There’s also the argument in defense that it may not be obstruction because the police were going to inevitably find out that fact anyway. So the onus would be on the police to prove you were deliberately trying to mislead their investigation, and that it substantially impeded the investigation.
It seems to me the federal statute simply makes it easier to prosecute someone for essentially the same crime.
The point is that there is no crime called “lying to the police” in most states that is equivalent to the “lying to federal investigators” charge in the federal system.
A lot of crimes involve an element of some kind of deception, such as screwing with evidence, tampering with official records, and good old-fashioned fraud. Obstruction generally can’t be charged against a suspect in the investigation that is allegedly obstructed, but it can be charged against witnesses.