In this episode of Stuff You Should Know, the hosts examine an unsolved murder case from 1922 Bavaria, where the wealthy Gruber family and their maid were found dead on the Hinterkaifeck farm. The episode details the troubled family dynamics of the Grubers, including rumors of abuse and incest, and the strange events that preceded their deaths, such as mysterious footprints and unexplained noises in their attic.
The summary covers the discovery of the bodies and the subsequent investigation by Munich police. Two main suspects emerged: neighbor Lorenz Schlittenbauer, who claimed to be the father of one of the victims' children, and Victoria Gruber's presumed-dead ex-husband. Despite interviewing over 100 suspects, the case remains unsolved, with evidence suggesting that the killer continued to live on the property after committing the murders.

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In Bavaria, the wealthy but reclusive Gruber family lived on the Hinterkaifeck farm. The family consisted of Andreas Gruber, his wife Tetzilia, their daughter Victoria, and two grandchildren: Tetzilia and two-year-old Yosef. Andreas was known for being abusive, and rumors circulated about an incestuous relationship with Victoria, potentially resulting in Yosef's birth. Despite the family's isolation, Victoria maintained some community connection through her participation in the church choir.
A series of unsettling events preceded the tragedy. The family's maid quit after claiming to hear strange noises and footsteps in the attic. Andreas Gruber later discovered mysterious footprints leading to the house but none leading away, along with signs of attempted break-ins and unexplained items appearing on the property. He also reported hearing the same mysterious attic noises that the maid had described.
On April 4, 1922, the Gruber family and their new maid were found murdered, with their last known sighting on March 31. Dr. Johann Armüller determined that a matic was used to deliver fatal blows to their heads. The bodies were discovered in various locations: some in the barn hidden under hay, and others in the house concealed by household items. Eerily, signs suggested that someone had continued living on the property after the murders, tending to livestock and maintaining the house.
Police investigated numerous suspects, focusing particularly on two individuals. Lorenz Schlittenbauer, a neighbor who had previously claimed paternity of Victoria's son Joseph, drew suspicion due to his weak alibi and unusual behavior at the crime scene. Another suspect was Victoria's ex-husband Carl Gabriel, presumed dead in WWI, with rumors suggesting he may have returned for revenge. Despite interviewing over 100 suspects, the Munich Police Department was unable to solve the case, leaving it as one of history's most perplexing unsolved mysteries.
1-Page Summary
In a small village in Bavaria, the Gruber family lived on Hinterkaifeck, a semi-rural farm. The family included patriarch Andreas, his wife Tetzilia, their daughter Victoria, and two grandchildren, one of whom was also named Tetzilia, and a two-year-old boy named Yosef. The farm, known for its eerie quietness, particularly when a search party arrived, sheltered the wealthy yet very much disliked Grubers.
Andreas Gruber was known to be unfriendly and abusive towards his family. Reportedly, he and his daughter Victoria were involved in an incestuous relationship, which was believed to have resulted in the birth of his grandson Yosef. In town, some people believed the rumors, while others were skeptical, considering another man initially claimed paternity of Yosef but later recanted, possibly due to the prospect of alimony pa ...
The Hinterkaifeck Farm and the Gruber Family
In a bizarre sequence of events, a series of unsettling occurrences at the Gruber household culminated in tragedy.
The family's maid abruptly quit her job, claiming that the house was haunted. She reported having heard strange noises and footsteps coming from the attic, an assertion that would later be echoed by the homeowner himself.
Andreas Gruber, the head of the household, noticed a set of human tracks in the snow leading to the house, yet peculiarly, he found none leading away. This discovery was deeply unnerving for him. His subsequent hard target search around the property yielded no evidence of an intruder or signs that the person who made the tracks had left.
Adding to the list of strange occurrences, Andreas discovered scratches near the lock of his tool shed, as if someone had been attempting to pick it. These unusual activities were disturbing enough that he shared his concerns with neighbors. Moreover, a set of keys went missing, and a strange newspaper appeared on the porch, neither of which Andreas could explain.
Echoing the claims of th ...
The Strange Events Leading Up to the Murders
The hosts delve into the chilling details of the 1922 murder of the Gruber family and their maid, a mystery punctuated by the bizarre aftermath and investigation that ensued.
On April 4, 1922, a concerning silence led to the discovery that the Gruber family and their maid were murdered. The last sighting of the family alive had been on March 31. It was the unattended school and untouched farm that piqued neighbors' concerns.
The hosts describe a gruesome scene where the Gruber family, including Andreas, his wife Tetzilia, daughter Victoria, and grandchildren Yosef and Cecilia, along with their maid, were found murdered. The senior members, Andreas, Victoria, and Tetzilia, and young Cecilia were discovered in the barn, with fatal blows to their heads and their bodies concealed by hay. Inside the home, two-year-old Yosef was killed in his crib, and the maid was found deceased in her bed, both similarly hidden by household items. Dr. Johann Armüller concluded that a matic was the murder weapon. Tiziliah's clenched fists held tufts of her own hair, and Victoria had strangulation signs but ultimately succumbed to the pickaxe's lethal head blow. The attire of the victims suggested an evening attack as Victoria and Tertsia were still in regular clothes, while most others were in bedclothes.
The Discovery and Investigation of the Murders
The hosts explore various suspects and the complex motives in the unresolved crime, with a focus on the neighbor Lorenz Schlittenbauer and Victoria's declared-dead ex-husband Carl Gabriel.
The police scrutinized individuals with a motive as they canvassed for suspects. Lorenz Schlittenbauer, a neighbor and Victoria's suitor who once claimed paternity for her son Joseph, withdrew his claim due to financial liabilities. Victoria had intentions to sue Schlittenbauer for paternity before the murders, fueling speculation about his motives.
Schlittenbauer, who remarried and suffered the loss of a child, had a motive to avoid the scandal and financial burden of alimony if Joseph was indeed his son. His actions post-discovery of the murders raised eyebrows; as part of the search party, he disturbed the crime scene by unstacking bodies and later made off-putting remarks about God punishing the family.
Chuck Bryant highlights that the careful covering of the bodies suggests the killer had intimate knowledge of the house, which could point to Schlittenbauer. Despite his suspicious behavior, a link to the murders could not be solidified. Schlittenbauer provided a weak alibi of spending the night in his barn, amid concerns for burglars—a choice made more peculiar by his claim of asthma.
Another suspect in the case was Carl Gabriel, Victoria’s ex-husband, presumed dead in World War I. Rumors swirled that he might have returned for revenge upon learning of ...
Theories and Suspects in the Unsolved Case
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