A Terrifying Illness or a Clever Hoax? The 24 Personalities of Billy Milligan (9 photos)

Billy Milligan is one of the most famous people ever diagnosed with multiple personality disorder. As many as 24 distinct personalities shared his mind—ranging from ordinary teenagers to dangerous criminals. Because it was these "alter egos" inside Billy's body rather than Billy himself who committed a series of rapes and robberies, the court eventually found him not guilty by reason of insanity.





The verdict sparked fierce debate. Billy Milligan's story remains shrouded in mystery: were his 24 personalities a tragic psychological condition or a calculated hoax? Was Milligan truly mentally ill, or had he masterfully faked the disorder to escape prison? Let's take a closer look.

Billy Milligan's Childhood

William Stanley Milligan’s childhood was far from happy. He was the second of three children born to Dorothy Milligan, a struggling singer, and Johnny Morrison, a failed comedian. His parents were unmarried; in fact, Morrison had a family of his own, making Dorothy his mistress.



Billy’s mother showed little interest in raising her children, with acquaintances describing her as promiscuous and reckless. Naturally, Billy’s father was equally absent, preoccupied with his "legitimate" family and a rightfully jealous wife. Crushed by domestic strife, mounting debts, and a failing career, Johnny Morrison spiraled into alcoholism and soon took his own life.

Billy was just four years old at the time. According to psychologists, he possessed only one personality then. By the age of five, however, that number had grown to four.





Psychiatrists believe new personalities emerged whenever Billy tried to escape a harsh, traumatic reality. It was a defense mechanism—one that triggered at least 24 times. That was the number of distinct alters identified during his court-ordered psychiatric evaluation.

Billy Milligan's Crimes and the Discovery of His Alters

Milligan’s condition might have gone unnoticed had one of his personalities not decided to rob a pharmacy. He was sent to prison and released on parole a couple of years later. But within months, he was arrested again—this time on suspicion of raping three women.



It was during the preparation of his legal defense that Milligan's fragile mental state came to light. Initially, Dr. Willis C. Driscoll diagnosed the defendant with acute schizophrenia. However, subsequent evaluations revealed that experts were dealing with something far more complex...

Psychologist Dorothy Turner concluded that the patient was suffering from Dissociative Identity Disorder (DID), commonly known as multiple personality disorder. It is a rare condition, affecting only 1 to 5 percent of the population, and Milligan seemingly turned out to be one of them.



Turner believed the disorder stemmed from severe childhood trauma. Billy revealed that his stepfather, Chalmer Milligan, used to lock him in a barn and abuse him sexually. Billy’s mother later corroborated this in court, describing her husband as a tyrannical sadist, though Chalmer himself denied all allegations.

Although the court did not side with Chalmer, his friends and colleagues insisted he was an honest, peace-loving, and mild-mannered man. But as the saying goes, still waters run deep—and history shows that even violent serial offenders often appear perfectly pleasant on the surface.

A Landmark Court Ruling

As psychiatric evaluations mounted, Billy’s case grew stranger. Doctors initially identified ten distinct personalities within his mind, two of whom had committed the crimes. Later, another 14 personalities came to light, followed by a unifying alter known as "The Teacher."



Given the overwhelming psychiatric evidence, the judge had little choice but to acquit Milligan by reason of insanity. He received no prison time or probation for the robberies and rapes, as experts concluded the acts were committed by his alter egos rather than Billy himself. Milligan was committed to a psychiatric facility "until he regained sanity," becoming the first person in U.S. history to be acquitted on the grounds of multiple personality disorder.

The Enigmatic Story of Billy Milligan and His Alters

Milligan spent the following years bouncing between psychiatric hospitals, as doctors scrambled to study the enigmatic patient. Over time, specialists documented a total of 24 personalities. While some remained dormant deep within his mind, others surfaced frequently to interact with the outside world.



Here are the primary personalities identified by psychiatrists:

Arthur Smith — the leader of the alters, an intelligent, educated Englishman;

Adalana — a 19-year-old lesbian who admitted to committing the sexual assaults;

Shawn — a deaf four-year-old boy with a developmental delay;

Steve — a 21-year-old impressionist who often clashed with Arthur by mocking his accent;

Samuel — the only religious alter, a Jewish man;

April — a 19-year-old woman consumed by thoughts of killing Billy’s stepfather;

Kevin — a 20-year-old criminal who planned the pharmacy robbery;

Phil — a 20-year-old Brooklyn thug involved in drug dealing and armed robberies.

Intriguingly, each alter possessed unique skills: some painted still lifes, others played the harmonica, and some had a deep understanding of electronics.



Later came "The Teacher"—a 26-year-old persona who helped Billy recount his extraordinary life story to the world. However, his emergence raised suspicions among skeptics. Milligan himself had approached author Daniel Keyes about writing a book. Keyes agreed, but on one condition: Billy had to share details he had never disclosed to psychiatrists or reporters.

Milligan claimed he remembered nothing, as his alters had controlled his body for years. Keyes was on the verge of walking away when "The Teacher" suddenly surfaced, piecing together the fragmented memories. These sessions formed the basis of Keyes' famous book,

The Minds of Billy Milligan

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Whether this was a genuine psychological phenomenon or an elaborate charade remains a subject of debate. Regardless, Milligan’s story captured global attention. Yet, after nearly 11 years spent in prisons and psychiatric institutions, fame brought him little comfort. Saddled with massive debts, he eventually declared bankruptcy and faded into obscurity.

On December 16, 2014, American news outlet WBNS-TV reported his death. William Milligan had passed away from cancer in a nursing home on December 12 of that year.