The year was 1980, and a young Billy Capshaw, barely seventeen, was embarking on a new chapter in his life as an Army medic. He found himself sharing a barracks room with a seemingly ordinary young man named Jeffrey Dahmer. Little did Billy know that this encounter would forever alter the course of his life.

At first glance, Dahmer appeared to be an unassuming figure. As Billy chatted with his new roommate about music and other shared interests, he was optimistic that they would get along well. There was no hint of the darkness that lurked beneath the surface, a darkness that would later shock the world.

Unbeknownst to Billy, Dahmer was already a murderer. He had committed his first murder the year before, a chilling precursor to the horrific acts that would follow. This was a secret Dahmer guarded closely, presenting a facade of normalcy to those around him.

What started as a seemingly harmless roommate situation soon devolved into a nightmare for Billy. Dahmer, a master manipulator, harbored sinister intentions. Billy would become a victim of Dahmer's depravity, suffering unimaginable physical and emotional trauma.

The story of Billy Capshaw is a harrowing reminder of the human capacity for evil. It's also a testament to the resilience of the human spirit, as Billy has dedicated his life to helping others who have experienced similar trauma.

In February 1980, after being assigned to his base, Billy's initial impressions of Dahmer were positive. "I liked him at first," Billy recounted in an interview with The Sun, completely unaware of the dual nature that resided within Dahmer.

Billy would later realize that Dahmer was like "Dr. Jekyll and Mr. Hyde," a man capable of switching between a seemingly normal persona and a monstrous one in an instant. This duality allowed Dahmer to conceal his true nature from the world, making it easier to prey on his victims.

During Billy's first day on base, Dahmer extended an invitation for an evening drink in a nearby park. Trusting and unsuspecting, Billy accepted. However, the evening took a terrifying turn shortly after they began drinking.

Dahmer's facade crumbled, and he lunged at Billy in a sudden and violent attack. "I was in fight or flight," Billy recalled, his heart pounding in his chest. "I didn't know what to do. I was 17 and like, 'What the hell?'"

Overwhelmed by fear and confusion, Billy fled into the woods, with Dahmer in pursuit. He ran "like hell," desperately trying to escape the clutches of his attacker.

Managing to reach the barracks, Billy barricaded himself in a toilet, but Dahmer continued to pound on the door, relentless in his pursuit. The assault eventually ceased, and Billy returned to his room, only to find Dahmer asleep.

The following day brought even greater horrors. Dahmer, fueled by vodka, launched another attack on Billy. "He threw me around like a wet rag," Billy described, recounting the brutal assault. "He's trying to take my clothes off and then he raped me and I couldn't stop it."

Traumatized and desperate, Billy jumped out of their third-floor window to escape Dahmer's clutches. He was found by officers on the ground, suffering from a fractured pelvis.

At the military hospital, Billy recounted the horrific attack. He was asked to use a rape kit to provide evidence, but claims that no action was taken. Disturbingly, Dahmer himself showed up at the hospital in an attempt to discredit Billy's story, and Billy was subsequently returned to their room, where he faced further torment.

Over the following months, the abuse escalated. Dahmer subjected Billy to frequent beatings with an iron pipe, tied him up with rope, and drugged him with sedatives for days on end. The young medic was trapped in a living nightmare.

Whenever Dahmer indulged in his preferred drinks – gin, martinis, and orange vodka sipped from a Fanta bottle – Billy knew what was coming. He lived in constant fear, anticipating the next act of violence and degradation.

In the documentary "I Escaped A Murderer," Billy detailed the horrors he endured. "I begged him and screamed to leave me alone," he recalled, his voice filled with pain and anguish.

Despite being relieved of his duties to recover from his injuries, Billy's situation only worsened. Dahmer used the opportunity to exert even greater control, confining him to their room and intercepting his mail. Billy was isolated and completely at Dahmer's mercy.

One night, Dahmer returned to their room covered in blood after attending a festival. "He’d been at a festival and he came into our room covered in blood and there was a lot of it," Billy said. "You cannot get that kind of blood on you by a cut. It reeked of murder."

As a fellow Army medic, Dahmer had knowledge of drugs and their effects. He knew precisely how to administer doses that would incapacitate Billy without killing him. Billy believes he was a "test run" for Dahmer's later killings, a practice ground for his monstrous desires.

"I was absolutely his guinea pig for him to do what he liked with," Billy stated. He recounted screaming and struggling, but his efforts were futile. His attempts to seek help from his sergeant, who lived across the hall, were met with indifference. Billy's story highlights the societal attitudes of the time, where reporting rape, especially within the military, was often discouraged. "Everyone needs to understand how the military works," Billy explained. "There are some things you just don't say. Rape is one of them, back in 1980. No one did a thing. I found out from a nurse later on that they just discarded the rape kits."