Dr. Sarah Corwin assisted Grodd in his attempt at world domination.
A lead scientist employed at the River Bluffs Research Laboratory near the outskirts of Central City, Dr. Sarah Corwin started an Internet romance with Gorilla Grodd. When Grodd escaped Gorilla City, he hid at Corwin's laboratory disguising himself as just another test animal.
In secret, they constructed a machine that generated an energy field similar to the one that keeps Gorilla City hidden from human eyes in Africa. When Grodd was defeated by the Flash, she revealed that he never tried to control her and loved her. Flash was disturbed by her words. Corwin was presumably incarcerated for her part as an accomplice.