Serial Killer Joseph Briggen: The Historical Case Behind the Legend
Background
Joseph Briggen is frequently identified in modern serial-killer references as a California farmer and suspected serial murderer who supposedly killed a dozen or more laborers between the late nineteenth century and 1902. The story most often associated with him is particularly gruesome: Briggen allegedly recruited homeless men and transients as farmhands, murdered them when they demanded their wages, dismembered their bodies, and used the remains to feed his hogs. Later accounts generally place the number of victims at twelve or more and describe Briggen as the owner of unusually successful prize-winning pigs.
However, a closer examination of surviving historical information reveals a major problem with the traditional version of Briggen's story. The documented 1902 murder connected to Joseph Briggen is substantially different from the account repeated in modern serial-killer encyclopedias. There is a verifiable victim, Joseph Mattli, and there are historical records establishing Mattli's death, Briggen's prosecution, and Briggen's imprisonment. At the same time, the frequently repeated claims of twelve murdered ranch hands, numerous skulls, and victims being fed to hogs are much more difficult to substantiate. For that reason, Briggen's classification as a serial killer should be regarded as historically disputed rather than unquestionably established.
Joseph Briggen in San Mateo County
Records place a man named Joseph Briggen in San Mateo County, California, before the murder. His surname appeared in several forms in contemporary and later accounts, including Briggen, Brigger, and Briggan. Such spelling variations were not unusual in records involving immigrants during this period. A Joseph Briggen appears in San Mateo County naturalization records in the early 1890s, confirming that a man of that name was living in the area well before the homicide for which he became notorious.
Later serial-killer accounts generally describe Briggen as having been born around 1850 and portray him as a northern California farmer who raised Berkshire hogs. They claim his animals regularly performed well at agricultural exhibitions and that Briggen attributed his success to their feed. Those accounts then attach a sinister explanation to that statement, claiming human remains were incorporated into the animals' food. These colorful details became central to the Briggen legend, but they should not be treated with the same degree of certainty as the documented Mattli murder.
The Murder of Joseph Mattli
The strongest historical evidence concerns Joseph Mattli, a 35-year-old immigrant from Switzerland who was working in San Mateo County in June 1902. Mattli's name is preserved in county death records, which give his date of death as June 15, 1902. His place of death was recorded as a location known as Rice Ranch in San Mateo County. The official record attributed his death to injuries inflicted with a sharp instrument.
Mattli worked as a laborer associated with a local mill operation and had an employment relationship with Briggen. Later historical reconstruction of the case indicates that Briggen owed Mattli a considerable amount of unpaid wages. Accounts differ concerning the precise amount, with estimates ranging from approximately $100 to as much as $500, but the unpaid money became an important part of the prosecution's explanation for the killing.
Mattli disappeared in June 1902 under circumstances that initially might have allowed someone to assume that the unmarried laborer had simply left the area. The disappearance soon became suspicious because a witness, whose surname was recorded as Koard in a later reconstruction of the contemporary case, reportedly saw Briggen leaving Mattli's cabin on the morning connected with the killing. Briggen appeared to have blood on his clothing.
Discovery of Mattli's Body
San Mateo County Sheriff Joel Mansfield became involved in the investigation. A search of Mattli's cabin revealed bloodstains, providing physical evidence that something violent had occurred inside. Investigators subsequently searched the surrounding property and discovered Mattli's body concealed in a shallow grave. His remains had suffered extensive injuries consistent with an attack using a sharp implement. Later descriptions of the case identify the murder weapon as a hatchet.
The circumstances strongly suggested an effort to conceal the homicide rather than report an accidental death. Mattli had been killed, his body had been removed from the immediate scene, and his remains had been placed in a hastily concealed grave. Briggen was arrested and prosecuted for the killing.
Verified Victim and Alleged Victims
- Joseph Mattli - Age 35. Born in Switzerland. Died June 15, 1902, at or near the property known as Rice Ranch in San Mateo County, California. County death records state that he was killed with a sharp instrument. Investigative accounts describe a bloody crime scene in his cabin and his body being discovered in a shallow grave. Briggen was subsequently convicted of Mattli's murder. Mattli was buried at Union Cemetery in Redwood City on June 20, 1902.
- Unidentified alleged victims - Later serial-killer references claim Briggen murdered at least twelve men, primarily homeless men or transient laborers recruited from San Francisco. These accounts generally place the alleged murders between approximately 1880 or 1894 and 1902. Individual names and exact dates of death for these alleged victims have not been reliably established in surviving records located for the case.
The Trial and Conviction
Briggen was tried for the murder of Joseph Mattli in 1902. The evidence included the circumstances of Mattli's disappearance, blood discovered in the cabin, the recovery of Mattli's remains, testimony concerning Briggen's presence at the scene, and evidence concerning money Briggen allegedly owed his employee. The case against him was persuasive enough that the jury reportedly deliberated for only about an hour before reaching its decision.
Briggen was found guilty of first-degree murder and received a life sentence. He was sent to San Quentin State Prison. This conviction is important when separating documented history from the later serial-killer narrative: the identifiable murder for which historical evidence survives is the killing of Joseph Mattli, rather than a prosecution proving twelve separate murders.
The Story of Steven Korad
Modern accounts of Briggen's alleged serial murders frequently introduce a young farmhand named Steven Korad, sometimes spelled Steven Konrad. According to that version, Korad had recently been hired by Briggen and discovered two severed human fingers in or near his sleeping quarters. Horrified by the discovery, Korad supposedly escaped from the property and contacted police. Investigators then allegedly searched Briggen's ranch and uncovered human bones and approximately twelve skulls.
There is an important resemblance between this later story and the documented Mattli case. The historical account contains a witness named Koard who provided crucial information after reportedly seeing Briggen leaving Mattli's cabin with what appeared to be blood on his clothing. This raises the possibility that details surrounding Koard were altered as the story was retold over subsequent decades, eventually producing the Steven Korad narrative. The claim that Korad discovered severed fingers is therefore best treated as part of the later serial-killer account rather than an independently verified fact.
The Alleged Hog-Farm Murders
The best-known version of the Briggen story portrays him as operating a remote northern California farm while making periodic trips into San Francisco. There, he allegedly searched areas frequented by homeless men and transient workers and offered them employment. Room and board were supposedly included, making the offer attractive to men with few other opportunities.
According to this version, trouble began after a new employee had worked for Briggen for several weeks and requested actual wages. Rather than pay the worker, Briggen allegedly murdered him. The body was then supposedly dismembered and fed to Briggen's hogs. The story claims this process was repeated with successive workers, explaining why Briggen appeared to have difficulty retaining farmhands while simultaneously providing a convenient means of disposing of their bodies.
Later writers claimed that Briggen believed feeding human remains to his hogs improved the animals and contributed to the quality of his livestock. His supposed remark that the secret was in the feeding became one of the most frequently repeated details associated with him. The narrative eventually developed into claims that police excavated his property and discovered skeletal material representing approximately twelve victims.
Problems With the Traditional Serial-Killer Account
There are substantial reasons to be cautious with those claims. Modern sources repeatedly state that Briggen was sentenced to life imprisonment in 1902 and died in San Quentin in 1903. Historical research into the Mattli case, however, indicates that Briggen remained alive for years afterward and was still connected with San Quentin as late as 1910. One newspaper account from that year concerned money Briggen claimed to have hidden before his imprisonment. He reportedly gave a fellow prisoner information about approximately $1,360 in buried gold so the money could be recovered for his legal efforts, only for the other man to allegedly take the money instead.
Even more significantly, historical reconstruction indicates that Briggen served approximately eight years before being paroled. If correct, this directly contradicts the commonly repeated claim that he died in prison shortly after his 1902 conviction. His subsequent whereabouts are uncertain.
The documented description of Mattli's death also differs dramatically from the later hog-farm narrative. Mattli was not an unidentified homeless man whose remains disappeared into a pig enclosure. His body was recovered from a shallow grave, his death was officially recorded, he was identified by name, and he received a burial in Redwood City's Union Cemetery. The surviving death record gives a precise date and location and records homicide by a sharp instrument.
How the Legend May Have Developed
The Briggen story appears to demonstrate how a genuine historical murder can grow substantially as it passes through true-crime literature. Elements of the documented case are recognizable within the later legend: Briggen employed a laborer, money or unpaid wages provided a possible motive, a witness with a name resembling Korad was important to exposing the crime, the victim suffered extensive sharp-force injuries, and Briggen received a life sentence in 1902.
Later versions appear to have expanded those elements into a much larger serial-murder narrative. The witness Koard became Steven Korad or Konrad. Instead of witnessing suspicious behavior connected to Mattli's murder, he was said to have discovered severed fingers. A single concealed body became numerous skeletons. Briggen's employment dispute with Mattli became a repeated pattern of killing laborers whenever they demanded payment. Finally, the bodies were incorporated into the memorable story about prize hogs being fed human remains.
Victim Count
Joseph Briggen is commonly assigned a victim count of twelve or more in serial-killer databases and encyclopedic lists. Some versions suggest thirteen or even an unknown number beyond twelve. Nevertheless, the identities of those additional alleged victims are consistently missing. There are no dependable lists giving their names, ages, dates of death, or individual disappearance circumstances.
Because Joseph Mattli can be identified in contemporary county records and his June 15, 1902 death can be independently established, he should be separated from the unnamed victims attributed to Briggen in later literature. Mattli is the historically documented homicide victim. The remaining alleged victims constitute an unverified serial-killer claim unless further contemporary police, court, coroner, prison, or newspaper documentation is located.
Aftermath
Mattli's death shocked residents of San Mateo County. His June 1902 burial was in the public-ground section of Union Cemetery in Redwood City, and the surviving cemetery register records his interment. His grave was apparently unmarked, leaving little visible indication of a homicide that had once attracted considerable local attention.
Briggen's conviction sent him to San Quentin with a life sentence, but historical accounts indicate that the sentence did not result in him dying there in 1903 as later serial-killer profiles repeatedly claim. Instead, evidence placing him alive years later and reports that he was eventually paroled make the traditional biography chronologically impossible in important respects.
Legacy
Joseph Briggen remains listed in numerous compilations as one of America's early serial killers, usually credited with at least twelve victims and remembered for the allegation that he disposed of murdered workers by feeding them to hogs. It is an extraordinarily memorable story, which likely explains why it has continued to circulate for decades.
The underlying historical record presents a more complicated picture. There was a real Joseph Briggen in San Mateo County. There was a real murder in 1902. Joseph Mattli really died on June 15, 1902, and Briggen was convicted of murdering him and sentenced to life imprisonment. What remains uncertain is whether Briggen was actually responsible for the additional eleven or more murders attributed to him by later writers.
For an accurate account of the case, Joseph Mattli should therefore be identified as Briggen's verified victim, while the alleged homeless and transient victims should remain classified as unidentified and historically unconfirmed. The distinction preserves the known facts of Mattli's murder without presenting the dramatic later additions to the Briggen legend as established history.
