, the school that sponsored blessing ejiofor's i-20 visa. >> evelyn mack: hi, i'm evelyn mack with evelyn mack academynamesake academy in this low- slung building. not at m.i.t. only 50 kids went toher school, yet she issued visas for more than 75 international students, arousing suspicions of u.s. homeland security investigators. >> kenny smith: evelyn mack-- had a school. and she applied for and received-- authorization from the department of homeland security to admit foreign students. >> wertheim: assistant u.s. attorney kenny smith prosecuted a case against mack in 2018 for conspiracy to harbor aliens. she pleaded guilty; her school shuttered overnight; and she is now serving 18 months in federal prison. so she filled out paperwork so that students from africa could come to this school? >> smith: yes, africa and other countries. >> wertheim: who was asking her to do this? >> smith: there were basketball coaches. there were basketball recruiters. and they went to-- evelyn mack to use the authorization she had received. >> wertheim: so these are middlemen who say, "i-- i've got to get that player t