He went outside not knowing that they were waiting for him. Cant do much about that but his mistake was to even engage with the LEO's. You are under no legal obligation to say anything other than lawyer to them (you probably should not even say that but just out of courtesy so they know what they are faced with if they continue this line of questioning). If they still try to get you to talk you say lawyer and then harassment in that order. Nothing else. Unfortunately they got him to talk. Never open your mouth is my advice. Never open the door for the LEO's as this will give them probable cause and they WILL lie about a smell even if there is none. That is the point of not opening the door in the first place.
I feel for ya bro and i know this is gonna sound bad but i hope you learned your lesson.
I feel for ya bro and i know this is gonna sound bad but i hope you learned your lesson.