So, they(cops) got a dude for questioning, no lawyer present and they ask dude for a gunshot residue test, dude allows. My question is was it legal to ask and as long as dude consenting is it allowed?

Completely legal.
However, he is a fool for allowing it. Remember, the police can lie to you, but it’s illegal for you to lie to the police.

If he’s been read his Miranda rights, he’s fair game.

don’t say nuttin

Always legal to ask as long as he doesn't say the magic word, "lawyer". All questioning has to stop if he does and can only be restarted at his request and under no duress.

Was in a hurry when posting, can dude say no without a lawyer or requesting a lawyer. Kinda like all those police/citizen interactions videos requesting ID and citizen says he ain’t done nuthing wrong to present an ID

Sure he can say no to a request without a lawyer present. Sometimes the ID thing can be different. In some instances where Reasonable Suspicion exists you may be required to present ID. Of course you can always say no and get a ride downtown until you present ID. Generally speaking though, you don't have to present an ID unless it falls into special circumstances. For a gunshot residue test, or DNA sample, any of that, if you say no then they will need a Search Warrant.

Which, while correct, is absolutely BS.

What State is “reasonable suspicion” considered a crime?

Was in a hurry when posting, can dude say no without a lawyer or requesting a lawyer. Kinda like all those police/citizen interactions videos requesting ID and citizen says he ain’t done nuthing wrong to present an ID
[/quote]
Sure he can say no to a request without a lawyer present. Sometimes the ID thing can be different. In some instances where Reasonable Suspicion exists you may be required to present ID. Of course you can always say no and get a ride downtown until you present ID. Generally speaking though, you don't have to present an ID unless it falls into special circumstances. For a gunshot residue test, or DNA sample, any of that, if you say no then they will need a Search Warrant. [/quote]

What State is “reasonable suspicion” considered a crime?
[/quote]
its not. if the officer has RAS - reasonable articulable suspicion that a crime has been committed, is being committed, or about to be committed then the officer can ask for ID. this is a lot more detailed than just some dude telling the popo that a bm robbed them or something like that. then the popo go out and stop and id every bm walking on the street

https://www.hesterlawgroup.com/blog/2023/october/what-is-reasonable-suspicion-/

Sure he can say no to a request without a lawyer present. Sometimes the ID thing can be different. In some instances where Reasonable Suspicion exists you may be required to present ID. Of course you can always say no and get a ride downtown until you present ID. Generally speaking though, you don't have to present an ID unless it falls into special circumstances. For a gunshot residue test, or DNA sample, any of that, if you say no then they will need a Search Warrant. [/quote]

What State is “reasonable suspicion” considered a crime?
[/quote]
its not. if the officer has RAS - reasonable articulable suspicion that a crime has been committed, is being committed, or about to be committed then the officer can ask for ID. this is a lot more detailed than just some dude telling the popo that a bm robbed them or something like that. then the popo go out and stop and id every bm walking on the street

https://www.hesterlawgroup.com/blog/2023/october/what-is-reasonable-suspicion-/[/quote]
Thanks Bhammedic. I answered but it wouldn't let me post because the thread was too deep. Reasonable suspicion, and Bham explained it, gives an officer the right to stop and frisk. That includes asking for ID. Don't like it talk to the Supreme Court.

Another thing I saw where LE is allowed to lie to citizens. Again Supreme Court says it is OK, but that is only done in investigative purposes, and not done wholesale or Willy Nilly.

What will they do to you if you lie?

On state level ? Nothing. LEOs are lied to almost everyday. That’s why there is always two sides to the calls they go to.

Thou shall not lie is one of the Ten Commandments. It is NOT a crime to lie to a police officer.

It is a crime to file a false police report OR to cause a report to be filed when it is based on a lie.

It is illegal to lie under oath (perjury).

It is illegal to lie to a Federal Agent when being investigated.

To the OP’s original question, I don’t know how the individual ended up at the police station but YES it is legal for them to ask and YES it is allowed, however, there could be issues come up later.