Let me preface my answer with the statement that I have never been nor do I plan to spend any time in the custody of law enforcement.
One major additional reason to passcode lock you phone! If you're involved in a accident the police can now check your phone for use prior to the wreck.(Depending on your state) If you are arrested they can go through your phone while taking inventory of personal belongings, who knows what (or who) they turn up.
You cannot be compelled to unlock the phone to allow them access to the data. Just one more reason to keep it locked.
One major additional reason to passcode lock you phone! If you're involved in a accident the police can now check your phone for use prior to the wreck.(Depending on your state) If you are arrested they can go through your phone while taking inventory of personal belongings, who knows what (or who) they turn up.
You cannot be compelled to unlock the phone to allow them access to the data. Just one more reason to keep it locked.