Is Wang still in the lab with you? In my game at this point he's nowhere to be seen. I also appear to have the same items as you in inventory and am able to leave the lab.
I'll send you my last save before going down to the Monitoring room and hopefully that will get you moving again. Check your e-mail in a few minutes.
Rushes: I'm having the same problem that Sayra had in that I can't leave the lab. Wang has already left and I completed all the tasks that were supposed to be done. I just cant leave the lab. Here's the list of inventory items (same as Sayra):
Magnetic card
Victim pictures x 5
Files on Benson
Printout with company offices locations
Printout with plant occurrence areas
Tweezers
Evidence bag (empty)
Secured Box Wrapping (The wrapping of the box in an evidence bag)
Protective gloves
Can you send me the same save as you sent Sayra? Thanks.