Can you help me with teh meaning of highlighted parts?
"You got felony convictions?", investigator asked.
He srugged and spoke for the first time.
"I guess", he said.
A felony is a major crime.
If you have a felony conviction, you have been found guilty of committing a major crime.
"Do you have a criminal past of at least one major crime?" is about the same question.
An upstanding citizen is someone who never gets into trouble with the law and live a life that forwards the peace and prosperity of where they live. They don't have to be mayor or a community leader, but they can't detract from the town either.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.