Answer:
a. tortfeasor
Step-by-step explanation:
-A tortfeasor is a person that commits a tort which is an act that caused harm to someone and that results in legal liability.
-A criminal is a person that commits a crime.
-A runaway defendant is a person that was accused of a crime and is missing.
-A nominal defendant is when someone commits a crime but the physical identity is not known.
According to this, the answer is tortfeasor.