Alex Mercer

(this is edited after doing a little more studying) Dr. Alexander J. Mercer was an ex-scientist for Gentek. he'd gotten killed and fallen onto a vial of the Blacklight virus, a highly transmittable infection that evolved through Elizabeth Greene, who was a prior host of the Redlight virus. when Alex had awoken, next, he was within a morgue, where his cause of death was being inspected by two scientists. this, of course, sends them into a panic. Gentek show up, kill the scientists, and then try to kill Alex. he gets away, yadda yadda yadda, after a few days he's evolved to be almost a perfect hunter, a monster among mankind.