A lot of attorneys on this site advise that you should never lie to the police.
And I know that filing a false police report is a crime (misdemeanor) under California law.
But is it actually a crime in itself to lie to the police, when they approach you to ask you questions and you're likely the suspect? In other words, could they arrest you just for telling the lie, any lie, for obstructing an investigation? I've heard that courts presume suspects will lie to police. But say it's a family member lying to police about a relative's whereabouts, to protect them? Is that criminal obstruction?
Or is it technically just a bad idea to lie, because police will focus more closely on you for the lie, but technically the lie alone isn't sufficient to arrest for anything, not even obstruction?