Obviously you don't have the issue. #123 is the issue in which Mina was shot. But just like in the real world, being shot doesn't mean you will die. She was shown talking to Sonic & Sally in the hospital in Knothole on the very next page, which was not scanned but is discussed in the review for the issue on this site. Mina never died in the comic, but if the only thing you see are the scans posted on this site (or people discussing them) then you could come to that incorrect conclusion. The scans posted for any issue rarely tell the whole story, especially for the ones I have posted (such as Sonic #123). --True Red
I am responding to the answer that Mina+Knux got, saying that Mina did die. She died in Archie Sonic Comic issue #123.