Out of all the documents brought to the interview, the only things they wanted to see was the police clearance and proof of domicile in the US.
They would not approve the visa during the interview because we did not have the apartment lease agreement in hand, i.e. proof of domicile in the US. They said email it to them and the visa would be approved. We received the lease agreement from the US the next day and emailed it to the embassy, and received the passport with the approved visa a few days later.