An office clerk struggles to survive on the run after a corrupt government agency uploaded an assassin’s consciousness into his mind and forced him to commit murder.

I don't know if this is relevant to your intended plot, but to me it appears to be important to now whether he is aware that he has this assassins' consciousness, or whether it is buried deep in his unconscious, and controls him more completely. Why an office clerk? Which government agency? The method of forcing him to commit murder? (obviously, I am a psych major, and I have read a bit about mind control.)
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