
The Jeffrey MacDonald case, America's longest-running murder trial, has been the subject of numerous books, documentaries, and news articles. MacDonald, a former medical doctor and US Army captain, was convicted in 1979 of murdering his pregnant wife, Colette, and their two daughters, Kimberley and Kristen, in 1970. He has always proclaimed his innocence, claiming that a group of intruders was responsible for the murders. One of the key pieces of evidence in the case was MacDonald's use of the amphetamine diet pill Eskatrol, which some speculated may have triggered latent psychopathy or psychosis, leading to the murders.
| Characteristics | Values |
|---|---|
| Name of the diet pill | Eskatrol |
| Type of drug | Amphetamine |
| Effects | Psychosis, hallucinations, irritability |
| Usage | Weight loss |
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What You'll Learn

Jeffrey MacDonald's amphetamine use
Jeffrey MacDonald was a US Army captain, a physician, and a Green Beret. He was convicted in 1979 of murdering his pregnant wife, Colette MacDonald, and their two daughters, five-year-old Kimberley and Kristen, in February 1970. He was sentenced to three consecutive life terms and is currently incarcerated at the Federal Correctional Institution in Cumberland, Maryland.
MacDonald has always proclaimed his innocence, claiming that his family was killed by four intruders who entered his apartment through an unlocked rear door. However, prosecutors and appellate courts have pointed to strong physical evidence attesting to his guilt. The case has been the subject of numerous books, documentaries, and news reports, with some sources alleging that MacDonald's amphetamine use may have contributed to the murders.
In the weeks leading up to the murders, MacDonald acknowledged using amphetamine diet pills, specifically a drug called Eskatrol. He mentioned in his notes that he was taking Eskatrol for weight loss. While amphetamines were not illegal at the time and were commonly used for weight loss, MacDonald's use of these drugs has been the subject of much speculation and debate.
Author Joe McGinniss, in his book "Fatal Vision," proposed that MacDonald suffered from psychopathy or pathological narcissism triggered by a combination of amphetamine use and a demanding work schedule. McGinniss suggested that MacDonald's underlying personality disorder made it difficult for him to deal with women and his fears of his own potential homosexuality. However, filmmaker and writer Errol Morris, in his book "A Wilderness of Error," criticized McGinniss's account, arguing that it was dishonest and irresponsible.
During an Article 32 hearing, MacDonald was questioned about his drug use and denied using any hallucinogenic drugs. He admitted to taking diet pills containing amphetamines but claimed that they were not in the same category as hallucinogenic drugs like LSD. While amphetamines can cause hallucinations in certain situations, colleagues would likely have noticed if an emergency room doctor was hallucinating. However, it is important to note that amphetamine use could cause irritability and increase stress levels.
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MacDonald's psychopathy
The case of Jeffrey MacDonald, an American former medical doctor and United States Army captain, remains one of the most litigated murder cases in American criminal history. In 1970, MacDonald's wife, Colette MacDonald, and their two daughters were found murdered in their home. MacDonald was convicted of the murders in 1979 and has always proclaimed his innocence. He remains incarcerated at the Federal Correctional Institution in Cumberland, Maryland.
The case has been the subject of numerous books, documentaries, and news articles, with some sources labelling MacDonald as a psychopath. In his book "Fatal Vision", Joe McGinniss proposed that MacDonald was a psychopath who had overdosed on the amphetamine diet pill Eskatrol, which, combined with a heavy work schedule, triggered his latent psychopathy and led to the murders. McGinniss also discovered traits of narcissism, misogyny, and sociopathy in MacDonald, which he believed contributed to his psychopathic tendencies.
However, filmmaker and writer Errol Morris argued in his book "A Wilderness of Error: The Trials of Jeffrey MacDonald" that McGinniss's claims about MacDonald were untrue and irresponsible. Morris criticised McGinniss's account of the night of the murders, questioning how a Green Beret emergency room doctor could be driven to murder by bodily fluids. Morris also pointed out that MacDonald had always maintained his innocence and had shown no remorse for the crimes, which could be indicative of psychopathy.
While some sources claim that there were obvious signs of psychopathy in MacDonald, others suggest that these conclusions were reached by those who wanted a guilty conviction. Additionally, it has been noted that MacDonald exhibited signs of bipolar disorder, with witnesses stating that his mood could vary drastically. The concept of psychopathy has been used to explain how someone who was accomplished and respected could commit such heinous crimes, suggesting that MacDonald was hiding behind a mask of sanity.
The debate over MacDonald's psychopathy and his potential involvement in the murders remains a subject of fascination and controversy, with some believing he was wrongly convicted and others maintaining that he is a murderous psychopath.
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The MacDonald murders
On the morning of February 17, 1970, military police arrived at the home of Captain Jeffrey MacDonald, a 26-year-old Special Forces surgeon, in Fort Bragg, North Carolina. They found MacDonald lying unconscious across the mutilated body of his wife, Colette. Their two young daughters, five-year-old Kimberley and Kristen, were found stabbed and bludgeoned to death in their bedrooms. MacDonald told investigators that he had fallen asleep on the couch and awoken to find four intruders standing over him—three men, including one in an army jacket, and a woman with long blonde hair, dark clothing, and a floppy hat, holding a candle. He claimed that the men attacked him with a club and stabbed him in the chest, and he lost consciousness.
Investigators were unconvinced of MacDonald's story. They noted that the only signs of a struggle in the house were a top-heavy living room coffee table and a flower pot that had not been knocked over. They also pointed to physical evidence that contradicted MacDonald's account, including blood and fiber evidence, and the discovery of the murder weapons—an Old Hickory kitchen knife, an ice pick, and a 31-inch piece of lumber—outside the back door of the house, which were determined to have come from the MacDonald home. MacDonald later claimed to have never seen these items before.
In August 1979, Jeffrey MacDonald was convicted of murdering his pregnant wife and two daughters and was sentenced to life in prison. He has always maintained his innocence, and the case has been the subject of numerous books, documentaries, and a TV miniseries, with some arguing that MacDonald was wrongfully convicted.
As for the diet pill, it was called Eskatrol, an amphetamine diet pill. It was surmised by Joe McGinniss that the drug, combined with MacDonald's heavy work schedule, triggered his latent psychopathy and led to the murders. However, this theory has been disputed by others, including filmmaker Errol Morris, who wrote a book and directed a documentary series about the case, titled "A Wilderness of Error."
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MacDonald's narcissism
The case of Jeffrey Robert MacDonald, a former medical doctor and United States Army captain, remains one of the most litigated murder cases in American criminal history. MacDonald was convicted in 1979 of murdering his pregnant wife, Colette MacDonald, and their two daughters, aged five and under, in 1970. He was sentenced to three life sentences and remains in prison today.
MacDonald has always proclaimed his innocence, claiming that a group of four intruders, consisting of three men and one woman, entered his apartment and committed the murders. He also asserted that the intruders attacked him, leaving him wounded. However, prosecutors and appellate courts have pointed to strong physical evidence of his guilt.
The case has been the subject of numerous books, documentaries, and news articles, with some sources alleging that MacDonald exhibited narcissistic traits. One source describes MacDonald as having "narcissistic needs," an inflated view of himself, and a tendency to fly into rages over meaningless issues. This description aligns with the diagnostic criteria for Narcissistic Personality Disorder, which includes an exaggerated sense of self-importance, a need for excessive admiration, and a sense of entitlement. Additionally, MacDonald's refusal to admit guilt and his rigid insistence on his innocence, even when confronted with evidence, can also be indicative of narcissistic behaviour.
Joe McGinniss, the author of "Fatal Vision," a book about the case, described MacDonald as a "narcissistic sociopath," stating that he lacked the capacity to feel emotions and exhibit empathy. McGinniss also attributed the trigger for MacDonald's actions to a combination of the diet pill Eskatrol, a punishing work schedule, and underlying narcissism, among other traits.
The case has sparked debates about journalistic ethics and the accuracy of media portrayals, with some critics arguing that McGinniss's portrayal of MacDonald was unfair and deceptive. Despite the varying opinions and ongoing discussions surrounding the case, MacDonald remains incarcerated, with his requests for parole denied due to his continued denial of guilt.
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The Fort Bragg murders
On the morning of February 17, 1970, military police from Fort Bragg were dispatched to the home of Captain Jeffrey MacDonald, a 26-year-old Ivy League-educated surgeon and Green Beret. There, they discovered the bodies of MacDonald's pregnant wife, Colette, and their two young daughters, Kimberley and Kristen. They had been brutally beaten and stabbed to death. MacDonald himself was found alive but wounded, with his head on his wife's chest and one arm around her neck. He claimed that a group of four or five hippies had broken into their home, knocked him unconscious, and murdered his family.
One of the most prominent theories surrounding the case is that MacDonald suffered from psychopathy or narcissistic personality disorder, which, combined with a heavy workload and the use of amphetamine diet pills, triggered a murderous rampage. Joe McGinniss, in his book "Fatal Vision," proposed that MacDonald had a latent psychopathy that was unleashed by the diet pill Eskatrol, resulting in the brutal murders. MacDonald acknowledged using the pills but disputed the quantity alleged by McGinniss.
Errol Morris, an Oscar-winning filmmaker, challenged McGinniss's theory in his book "A Wilderness of Error: The Trials of Jeffrey MacDonald." Morris argued that McGinniss's account was dishonest and irresponsible, and he presented alternative explanations for the murders. The case continues to captivate and divide public opinion, with various books and documentaries offering their own interpretations of the tragic events.
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Frequently asked questions
Jeffrey MacDonald was taking a diet pill called Eskatrol.
MacDonald was taking the pills for weight loss.
It is speculated that the amphetamine in the diet pills, combined with a punishing work schedule, triggered latent psychopathy.
Jeffrey MacDonald was convicted in August 1979 and remains in prison today.



































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