Letter GTA 5 guide, walkthrough
Last update: Wednesday, May 25, 2016
The penultimate step unlocks after completing the main plot mission called Meltdown and it consists on reading a letter at Solomon Richards' office.
The office that we reach by long stairs is open only in late hours, that is from 9 o'clock in the evening.
In the office we find a letter informing us about existence of another place which we should visit now to complete our investigation.