Once you answer SOME questions, it opens the door to asking why you refused to answer other questions.
This is why, if you suspect you are being questioned, or going to be questioned, with an eye towards charging you with an offense, you should not answer any questions, but just say that all questions should be directed, in writing, to your lawyer.
So they asked him questions before arresting him or reading him his rights...
I guess the police have just learned that if they wait long enough to read you your rights, they can gain an advantage...
They can just tell you that you aren’t under arrest, and question you...
Then arrest you.
Think about how ridiculous that is.
"Were you at the scene of the crime?"
"No"
"Do you know anyone who was at the scene of the crime?"
"No"
"Is your name John Smith?"
"Yes"
"Do you live at 1234 Easy Street?"
"Yes"
"Will the shotgun you own match the ballistics of the murder weapon?"
*silence*
The first questions are either known or are ridiculously trivial. What the Hell difference does it make?
Devil's advocate: Cop pulls you over because your car matches the description of a getaway vehicle in the area. If you immediately lawyer up, you're immediately assumed to be guilty, no? So at that point, you've got choppers flying overhead and half the PD surrounding you. You didn't do it, but you were silent. As such, the real criminal actually got away while you rot in jail waiting for someone to bail you out on suspicion of committing armed robbery.
Our judicial system is completely screwed from its origins.