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.
i still would not talk... even if i were not under arrest... i won’t even talk with an officer issuing me a speeding ticket... i hand over the license and registration... i sign it and leave.. no hello officer.. no small talk... no good-bye... nada! (although back in the day, i talked myself out of a couple of tickets)...