Earlier quoted context omitted.
You can easily implicate yourself at the scene of the crime by speaking to an officer, but in the U.S. you have the "right to remain silent". The article is generally referring to cases where you are guilty of something or could be guilty of something.
It's not about being guilty or not being guilty. For worse, the police in the US have become (or are perceived to be) generally antagonistic towards the communities they police. It's not a universal truth, but it is a common truth. Just like you wouldn't volunteer everything to a rival in the office, you don't volunteer everything to someone who has the authority to arrest or fine you. Especially when they know all t…
To put it another way: if a policeman isn’t the best (safest, most informed, whatever...) person to talk to among hundreds of strangers you could talk to, isn’t that a sign that the police force in question has failed completely?