I don't need a link to a study to tell you what it means. The meaning is exactly the same as in normal speech, too bad for you since you'll have to do even more

I don't need a link to a study to tell you what it means. The meaning is exactly the same as in normal speech, too bad for you since you'll have to do even more mental gymnastics to resolve your cognitive dissonance. It means someone was suspected (e.g. were at any time a suspect during the investigation), regardless of whether they actually committed anything or not.