Although it was a week night, the downtown area (where he would be traveling) is not desolate. If foul-play was involved on his way home, someone would have seen something (from a car, hotel window, passerby on foot). The last local news I saw (on the 8th) said that he was seen on camera on Duquesne Blvd near Clemente Bridge, just around corner from Katz. It would be awesome to hear they find one with him on Federal Street (on other side of bridge). Praying they find some information! I believe someone else pointed this out here earlier, and I know it may sound too simple, but if you add drinking + walking a descent distance in the cold this could be a spot to step off the path to use restroom. (pic below) There are steps off to the left of the 6th Street/Clemente Bridge. Those steps take you down underneath the bridge to the Heritage Pathway, which has NO railing or anything on the river side.