There are a lot of things anyone should understand when being questioned by the police. First and foremost, when the police are asking you questions, they’re often not there to help you; they’re seeking to obtain information that will help secure an arrest in a criminal matter. That’s not intended as an insult to those who wear the uniform, but it’s just a statement of fact –- that it is the job of the police to investigate potential crimes and, when appropriate, make arrests. Thus, unless the officer who approached you did so because your car has a flat tire on a busy highway, the chances are that the “helpful” officer talking to you is actually trying to get useful information relevant to a case on which they are working.
Also, be aware that whatever you say is likely to be regarded with suspicion by an officer, even if they give no outward signs of that or even appear empathetic. As the main protagonist of a popular TV show set in Florida once opined, “spies spend their lives telling lies, [while] cops spend their careers listening to them.” All that is to say that, when you find yourself being questioned by law enforcement officers, your first instinct should be to protect yourself legally, and that means getting a lawyer. A recent Fourth District Court of Appeal ruling in a South Florida case provides a useful example of this.