Local here. I've been following this story since the end of the first week of DJ going missing.
Here are some thoughts.
I searched the north side area, climbed into the overpass area another poster mentioned, walked two bridges and between them along the river, walked along the river edges, and searched the heritage trail.
In addition to what other people have posted, while walking the paths from town to the north side, I was struck by how many construction projects there are. I don't know if anyone has explored these areas in-depth. I didn't.
I've been following the poor mother's impassioned pleas for LE to release more info. Last weekend, the family obtained power of attorney so that they can access DJ's records--specifically his mobile's records.
There was a sizable party out yesterday searching further downstream, in Sewickley.
I could be wrong, but I don't think statements about the co-workers who spent time with DJ have been released publicly. I'm wondering what the co-worker who I think he put into an Uber might have to say. Would LE protect that info for some reason?
On the two FB pages and in comments in media articles, many readers are convinced that something more sinister is going on...a pattern of people who fit DJ's profile who have gone missing.
I think the family feels that the officials' efforts have been lacking. In a comment on an article, a family member said that LE members insinuated that they believe DJ didn't make it to or fully across a bridge and might feel as though he committed suicide. No info was released about why they feel that way.