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Leading biosoft engineer at Maas Biolabs and father of Angela (Angie) Mitchell.

At the beginning of Count Zero he indicates he seeks a corporate defection to Hosaka and Turner is engaged to facilitate the defection. Instead of extracting himself Mitchell sends his daughter Angie.

Turner later discovers Mitchell was a good engineer but lacked brilliance. He achieves the pinnacle of his profession when is given new concepts in boichip development by the new loa voodoo gods/fractured AI on the net. In return he embeds vvas bio-soft into his daughter Angie that enables her to interface the net without a deck and in turn allows the net entities to communicate through her.

Conroy tells Turner corporate spies inside Maas reported Mitchell killed himself by slitting his own throat after Angela escaped.