Lost Item No.: 1068778 - Los Angeles International Airport, California, US

I lost my passport and I think it wasn't given back to me at US Customs counter, after I got off of the delta aircraft coming from Mexico, and before loading onto the next aircraft going to PDX. We had 5 people with us and maybe one of the passports got left on the counter. We were there last Sunday, flight DL 770 Delta Airlines, landed in LA at 6pm. We boarded onto DL 1851 at 7:55pm. Please confirm. Rozalia Sem