A patient treated by Dr. von Niemann after a bat attack. Her death and the crucifix she handled are used by the doctor to frame Herman Gleib.
Otto initially appears to be Martha's treating physician, but later uses evidence connected to her death to frame another suspect.
Dr. von Niemann cares for Martha after she is attacked by a bat and examines her body after her death.
Martha's death provides a central case in Karl's investigation.
Brettschneider investigates Martha's death and examines the evidence linking her death to the previous blood-loss cases.
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