That’s not necessarily a problem. Cops are allowed to question people without arrest. It would be extremely hard to do any policing otherwise. There’s likely extremely technical legal limits that only criminal lawyers and judges are really capable of understanding that could invalidate that questioning.
Also there’s a reason the advice is never talk to the police.
tl;dr the cops questioned him for 20 minutes before arresting
That’s not necessarily a problem. Cops are allowed to question people without arrest. It would be extremely hard to do any policing otherwise. There’s likely extremely technical legal limits that only criminal lawyers and judges are really capable of understanding that could invalidate that questioning.
Also there’s a reason the advice is never talk to the police.