Review Detective Barnaby's case notes about a very unhelpful suspect. Select ALL the grammatically correct sentences!
The correct answers are The suspect isn't at home, They don't have the stolen diamonds, and We aren't sure who did it!
He don't is incorrect because the third-person singular pronoun "he" requires "doesn't" (does not).
The thief haven't is incorrect because "the thief" is singular and requires "hasn't" (has not).