Not just actively invoking the fifth, but talking non-specifically to the police, and then choosing not to answer further questions when it becomes clear they a

Not just actively invoking the fifth, but talking non-specifically to the police, and then choosing not to answer further questions when it becomes clear they are investigating you, is now explicitly evidence of guilt, which is absurd. So the only option is not to speak at all beyond the required minimum. Also, I'd say this is not the sort of thing one should tldr.