When it comes to a person's home or car, law enforcement can't search legally except under very limited circumstances. And while the issue hasn't been addressed by Pennsylvania courts, a California judge recently ruled that those same protections prevent federal law enforcement from forcing someone to unlock their mobile phone using biometrics like a fingerprint.
There's an old adage - often attributed to luminaries such as Abraham Lincoln and Mark Twain - that rings true in the context of criminal defense:
If a police officer questions you about a crime, your first instinct may be to fully explain the details of the event. After all, you may think that you are helping by providing a complete report to the police.