Greyhound

I live in Northwest Indiana. In the past I traveled from there to Grand Rapids, Michigan on Greyhound, with a concealed pistol on my person. Neither Greyhound station makes Greyhound passengers go through metal detectors, so traveling with a concealed handgun is pretty easy. Plus, Indiana and Michigan recognize each others' permits. Next month, my job is sending me to a conference in Indianapolis, and, although I have the option of driving, I don't really want to put additional wear and tear on my vehicle, so I plan to catch Greyhound. Does anyone know if I will have to pass through a metal detector at the Greyhound station in Indianapolis?