I updated my map with some key points.
There was a live broadcast on NBC Washington just a little bit ago that had information that I had not heard, but admittedly, I have not been able to watch much news lately.
These points can be added to the timeline, if not already on there.
3/19 - Kahlil left work abruptly and drove to Richmond and back, though they do not know why
3/19 - Social Worker arrives at DC General inquiring for Dr Tatum and paperwork explaining Relisha's absences
3/19 - Khalil and Andrea Tatum check into the Red Roof Inn, Rm 132
3/20 - Kahlil calls friend and asks him to pick him up at the Red Roof Inn and drop him off at the Southern Avenue Metro
3/20 - Shortly after Kahlil is picked up, Andrea Tatum is found dead in the hotel room.
I speculate now that the white truck actually belongs to the friend and may have actually been parked at the friend's residence in the 1600 block of N Street when it was found. I have not been able to find a link to any residents on that street to Tatum's FB yet, though I speculate that many of his "friends" are not actually on his FB.
Let me know if there is anything additional to add to my map.