I am hoping someone has experience with this. My SIL was questioned by CBP regarding pot use and it is in his file. He will be doing his consulate interview in a few months and in preparation for medical has been under a doctor’s care in Colombia getting monthly drug tests to show he is clean for the last year (will be 1.5 years by interview date). So, will this front loaded evidence be enough to keep from getting the automatic one year ban and get him approved or if not, what should we expect at the interview?