you have to experiment the picture with the magnifier end the microscope.
finish all the stations at the forgery detection lab. then you get the key to the storage lab. ( you need to become an employee first)
At the museum, you go to the top floor, and you will see a guy with a badge. click on him then do what he says. afterwards, go to the forgery detection lab and complete those jobs.
You go into the forgery detection lab, complete them then talk to the guard at the front doors. When you are done, go back down to the docks where you met the mysterious guy.
The scream. it is on the top middle level next to the forgery detection lab.
If you're talking about in counterfeit island, then after you get that job, you go into the forgery detective lab and finish the two "stations" there.
You get the piece of paper. But first you need to have the key (you get it in the Detection Lab) Hope this helps!
in the art gallery
In the Forgery Detection class, you only have to examine the three signatures to identify which one is fake.
Once you have correctly solved the switched-paintings challenge, you go to the Forgery Detection Lab in the Museum. You have to complete the tests to get the Supply Room key. (see related question)
alpha rays
Douglas. Blackburn has written: 'The detection of forgery'
you have to put all the pictures in place again (*see related question) then do your training in the fake detection lab, just behind the assistant curator.