So here's what I've got so far.
1) Carla's Digital photo of her Grandpa with the Psychotic looking Mad Scientist,
2) X Carl Hinvey Contract, Lease for Multiple rooms in the mall, (Carl Hinvey X = Xavier Lynch)
3) Xavier accessed the lab in from the cafe using his backstory - this was confirmed by Xavier contacting Johannes in the basement via the cctv speakers during the same phase. He claimed entering the first incorrect code to the freezer door and leaving it alone there after.
4) Xavier hinted to Terry about the door being in the Cafe, which is why Terry went looking for it and knew approximately where to find it.
5) Xavier claimed to be fixing the time machine in the lab, the lab also contains cctv cameras, a portal/teleporter system, and cloning vats. A generator adjacent to the cloning vats, and a laser attached to said time machine. There was a heavy duty power cord in the hardware store and Xavier went there in the 2nd phase, perhaps needed it to power the devices in the lab?
6) A clone appeared to have broken free of the cloning vats and escaped.
7) Mark Knorp claimed to be the failed clone that escaped the lab and was fatally stabbed while unconscious AFTER stating a goal of needing to eliminate the Mad Scientist who botched the job of creating him.
8) Xavier claimed he was being chased by someone that was trying to steal his youth - this could have been Mark - perhaps Marks goal was to correct himself using the original? If he was a clone of the mad scientist, then he too was the mad scientist and both had murderous intent.
9) Xavier in fact appears to be an old man when viewed in a reflection.
There may be a time difference, Terrys body was discovered during the next search of the lab by Yvonne and Jia sometime after he went missing, Casey might still have been alive in the Cafe with Carla at the time this discovery was made.
Are we assuming that the elevator fire was related to the explosion
No, the explosion was just after I went into the phone store. I found the access hatch to elevator not long after and climbed up to the office where Yvonne was. We figured out the anagram on the Carl contract to be meaning Xavier. The fire was sometime after the explosion, we nearly died from smoke inhalation, we smothered it by sending the elevator down with no one in it. The explosion shockwave was close enough to send me flying in the phone store and a gave me a bloody lip.
Do you still have anti-radiation medication?
Yes, and I know how to get where you are looking for. However, its irradiated beyond a certain point. I was going to try do a suicide run down there to try and neutralize the radiation, but without Casey's Geiger counter it is a risk. I have been wondering if the coin is relevant to that area, it is irradiated, so perhaps came from there and needs to be returned. That is why I was asking if your case was lead lined, so we could safely transport the coin.
We also found an unsigned template copy of a disclaimer stating the following.
To whom it may concern
We have nothing of value here in the mall. Your search should not start or finish here, we are
of no value to you.
If you search us, you will find nothing.
Rubberducky you're the one.