Somebody either did not check it through NCIC, or if you have ever seen a return from NCIC on guns you would quickly understand how it can slip through the cracks... many different manufactures of the 1911, was it entered as a Colt, or a Springfield or other mil contractor as the manufacturer? Was it check against the same mfg? looks like a Colt, must be a Colt, but it was actually made by ?... often times SN's are duplicated, not within a single MFG, but same number used by another MFG in another caliber... if not properly entered, it will throw the system off.. or give you 25 returns, can't all be the same gun... there are many ways it can slip through the cracks... The system is not infallable, and it is only as good as the combination of the Data Entry Clerk, or the person checking it.. and face it, not all police officers, or police employees are gun experts..
Btw.. there is something in my eyes too... Great story...!