Mark Doyle was a researcher at the Ibis Island facility. He originally worked in the Special Aircraft Experiment Room before being moved to the Third Energy Physics Laboratory.
Mark Doyle's body is found in the Front Area of Entrance, where only an arm and upper body remains.
Mark Doyle's ID registration number is 57036 in the US and EU releases, whereas it is 47812 in the Japanese release.
An An. Aid can be found when searching Mark Doyle's body, in addition to the DDK Code Disc N, which appears as a spinning icon.
Regina approaching Mark Doyle's body
Regina observing the remains of Mark Doyle's body
Regina searches Mark Doyle's body and finds an An. Aid.