What are some things that could cause a K1 Fiancee Applicant to get Denied?

Denials are most certainly going to be announced to the applicant during the interview if the foreign fiancee has been caught lying about past or present things that pertain to either the relationship, employment, travel, addresses, criminality, other visa interviews also denials can be brought on by falsifying documents, falsifying government forms, falsifying police and national records, all which could even lead to prison time and hefty fines. A K1 Fiancee or child during a medical exam could even test positive for TB causing delays and sometimes denials.  Admitting of drug use suicide in your past can also get your case denied.