There are essential three options here:
1) Scam Artist (Far and away most likely)
2)SGU offered this person a 85-95% scholarship despite their inability to conjugate verbs or wire coherently.
3) Hell is a balmy 31°F.
Sorry, but that's the lay of it. No stranger would be insane enough to cosign for you. If you are an actual medical student find someone at school.
This is NOT ValueMD