Answer:
would be diagnosed with Dissociative Fugue.
Explanation:
Dissociative fugue: In abnormal psychology, the term dissociative fugue is also referred to as a psychogenic fugue or fugue state, and is defined as a rare psychiatric and dissociative disorder which is distinguished as an individual having reversible amnesia for one's identity, for example, personality, memories, and related characteristics of his or her individuality, etc. Dissociative fugue can last through days, months, or even more than several months.
In the question above, Mr Jones most likely would be diagnosed with Dissociative Fugue.