If your son comes home to you and tells you, "I think I may have killed my fiancee..." what are the next logical steps? If you've seen any TV crime show, first maybe call a lawyer? ok, check. Then if you were a person with average ethics, you'd probably expect your son to do the right thing and give yourself up to the police, perhaps through your lawyer. Let's just say even he is ready to do so.
Is there any chance that at that point the lawyer says to you, "now, wait. No one is after you and you don't need to say anything. In fact, don't say anything at all until THEY come knocking on your door! KEEP QUIET."
Would that be considered good legal counsel or bad? At the end of the day, certainly it's your decision, not the lawyers. But if that's what you were told, how much more difficult would the decision be to push forward and talk anyway?
I only say this because I see people not make their own decisions all the time in healthcare. They just do surgeries and tests and take medication the doctor told them to and it never once occurs to them to even get a second opinion. And in the end when something goes wrong, they're told, YOU made that decision.
*Hypothetical question only. Not saying this is what happened at all. I am clear on what I will do but I still hope to God I will never ever have to be in this situation.