I’m not suggesting somebody be deliberately evasive. If you don’t want to be cooperative, then just don’t guess and don’t volunteer more than you know.
In practical terms, that means that you probably won’t have much to offer: you could make a guess on what you saw, but more likely you can defer to “I’m not really sure”, since you are being strictly literal with the information that you have.
Cops can’t really do much with somebody who just doesn’t know much; it’s the quickest and easiest way for them to just move on to better witnesses.
Have you ever seen big shot CEOs testify before congress? Suddenly they come across as the most incompetent person in charge; they don’t seem to know anything about how their business operates.
This is by design. If you are faced with answering questions, or getting fired, then you can choose to answer the questions to avoid getting fired, and still not be effusive with your answers.
Again, the advice is: don’t lie and don’t guess. So if you are being questioned about the guy who just came in, and you might think you recognize him, but you’ve never been introduced, then you can certainly answer “I’m not sure” if you are asked if you can identify him.
Eventually, police will just consider you a dead end and move on.
(This happens a lot with neighbors to some domestic situation. “Did you hear anything?”’ “Do you have cameras?” If you tell the cops you won’t answer their questions, they may move on, but they may also decide that you are in fact withholding information, and press further. But if you just go “sorry…I didn’t hear anything”, they aren’t going to waste any more time with you)
All the lawyer can do is tell you “you don’t have to answer that”. You can do that yourself - “I’m not going to answer that.”
No magic lawyer powers at play.
But, you the client aren’t doing yourself any favors if you do. You seem to think that “they can’t use your silence against you” to mean that cops can’t follow up with you if you don’t cooperate. But that’s certainly not the case. If you aren’t answering, that could be a reason to increase their suspicions of you, and double down on investigating you. Whereas a simple response, without elaboration, gets you out of the situation.
If you had nothing to do with the murder, I’d advise to answer those questions. Clamming up is just going to make you look suspicious.
“Did you dislike the manager enough to hurt him”. “No”
“Wasn’t his car keyed?” “I guess. Somebody said something about that. I don’t really remember.”
You think the better option is to huddle with your lawyer before declaring that you won’t answer these questions and are invoking your rights?
I’m guessing you figure the cops will just stop inquiring about you. But if you are the detective, is that really your reaction to such a move?
I think my suggestion is creating a lot less hassle, and in fact assisting the police with moving on to better suspects and more relevant clues.