Two questions?

"In five minutes, I'll ask you the question "Are you the criminal?" Will your answer be 'yes' then?"

The truth tellers that are not the criminal will simply answer "no". The liars that are not the criminals will know their answer would be "yes", so they also answer "no".

If the criminal is a truth teller, they'll simply answer "yes". If the criminal is a liar, they know they'd answer "no", so they'll answer "yes" anyway.

Two questions?

"In five minutes, I'll ask you the question "Are you the criminal?" Will your answer be 'yes' then?"

The truth tellers that are not the criminal will simply answer "no". The liars that are not the criminal will know their answer would be "yes", so they also answer "no".

If the criminal is a truth teller, they'll simply answer "yes". If the criminal is a liar, they know they'd answer "no", so they'll answer "yes" anyway.

Two questions?

"In five minutes, I'll ask you the question "Are you the criminal?" Will your answer be 'yes' then?"

The truth tellers that are not the criminal will answer "no". The liars that are not the criminals will know their answer would be "yes", so they also answer "no".

If the criminal is a truth teller, they'll answer "yes". If the criminal is a liar, they know they'd answer "no", so they'll answer "yes".

Two questions?

"In five minutes, I'll ask you the question "Are you the criminal?" Will your answer be 'yes' then?"

The truth tellers that are not the criminal will simply answer "no". The liars that are not the criminals will know their answer would be "yes", so they also answer "no".

If the criminal is a truth teller, they'll simply answer "yes". If the criminal is a liar, they know they'd answer "no", so they'll answer "yes" anyway.