Perseus (spy)
Although Haynes and Klehr noted that the agent identified as Perseus (or sometimes as "Mlad") has attributes and characteristics that do not match Hall, they still concluded that Perseus must have actually been an invention, the result of a misinformation operation with the goal of protecting Hall, who was still alive in the early 1990s. Which could explain the presence of attributes that coincide between both at the same time of others that do not.