Back in November I submitted a request through the US Citizenship and Immigration Services Genealogy Program to see if my great-grandfather Plutarco Vasquez Campuzano had submitted an Alien Case File, just as my great-grandmother Manuela Portillo had done. While I was in California this week for meetings, a letter arrived from the Genealogy Section of USCIS confirming that Plutarco had an Alien Case file (A-File). The documents are dated from 5 February 1962.
I have ordered a copy of the A-File using the file number provided by USCIS. The USCIS website is fairly easy to use. An A-file costs $35 to order, and you can pay online. I'll provide a further update once the file arrives. I am interested to see if Plutarco became a citizen or if he remained a permanent resident alien.