Isaac Heller: The Crimes of Isaac Young
Background
Isaac Heller, also known by his birth name Isaac Young, was an early nineteenth-century American murderer whose known crimes occurred in Pennsylvania and Indiana. He was born on May 2, 1809, in Dauphin County, Pennsylvania. Heller is commonly described as a serial killer because he committed a fatal attack in Pennsylvania and, several years later, murdered four members of his own family in Indiana.
Information about Heller is limited because his crimes occurred during the 1830s, when criminal records and newspaper reporting were often incomplete. Much of what is known about him comes from accounts of his trial and a confession published shortly after his execution. Some modern summaries contain conflicting details, particularly concerning the spelling of his first victim’s surname and the precise methods used against individual members of his family.
The Murder in Pennsylvania
In 1830, Heller killed a nine-year-old girl identified in later accounts as Catherine Muckeroy. Her surname has also appeared in variant spellings. The killing occurred in Pennsylvania, apparently in or near Dauphin County. Although an exact date and more precise location have not been reliably preserved, available accounts agree that Catherine died in 1830.
Heller reportedly attacked the child with a bladed weapon and decapitated her. He was arrested and prosecuted, but the court found him not guilty because of insanity. Rather than being sent to prison, he was placed in an institution. At some point afterward, he escaped or otherwise left confinement. He began using the surname Heller instead of Young and eventually moved west to Indiana.
The Pennsylvania case is important because it showed that Heller had already committed extreme violence before the destruction of his family. His release or escape also meant that he was able to establish a new identity and begin another life without many people in Indiana knowing about his past.
Marriage and Life in Indiana
After leaving Pennsylvania, Heller settled in Liberty, the county seat of Union County, Indiana. He married Elizabeth McCollan and became the father of three children: John Wesley, Sarah and Mary. The youngest child, Mary, was reportedly only about three months old at the time of her death.
To neighbors, Heller may have appeared to be an ordinary husband and father. Later accounts, however, describe him as experiencing severe religious delusions and disturbed thinking. He reportedly believed that he was receiving supernatural commands. Such claims became central to explanations of his behavior, although they did not prevent an Indiana court from holding him legally responsible for the murders.
The Murder of the Heller Family
On February 27, 1836, Heller killed his wife and all three of their children at the family home in Liberty, Indiana. Historical accounts identify an axe as the principal weapon. Heller reportedly obtained the weapon after giving an ordinary explanation connected with chopping wood. He then attacked the members of his household one after another.
Elizabeth McCollan Heller was struck and fatally wounded. The children were also attacked with the axe or with heavy blows from the weapon. Later summaries describe John Wesley as having been decapitated and Sarah and the infant Mary as having been bludgeoned. Because the surviving nineteenth-century descriptions are not equally detailed about every injury, the exact sequence of the attacks cannot be stated with complete certainty.
The four deaths transformed what might otherwise have been treated as a private domestic tragedy into one of Indiana’s earliest widely recorded family murder cases. The victims were killed in the place where they should have been safest: their own home. The fact that three of the victims were young children made the crime especially horrifying to the surrounding community.
Known Victims
- Catherine Muckeroy — Age nine. Killed during 1830 in Pennsylvania, probably in or near Dauphin County. Available accounts report that she was decapitated. No reliable exact date of death has been preserved.
- Elizabeth McCollan Heller — Heller’s wife. Killed on February 27, 1836, at the Heller family home in Liberty, Union County, Indiana. She was fatally attacked with an axe or by heavy blows from the weapon.
- John Wesley Heller — Heller’s son. Killed on February 27, 1836, at the family home in Liberty, Indiana. Later accounts describe him as having been decapitated.
- Sarah Heller — Heller’s daughter. Killed on February 27, 1836, at the family home in Liberty, Indiana. She was reportedly bludgeoned with the axe.
- Mary Heller — Heller’s infant daughter, reportedly about three months old. Killed on February 27, 1836, at the family home in Liberty, Indiana. She was reportedly killed by blows from the axe.
Arrest, Confession and Trial
Heller was taken into custody soon after the murders. Unlike the Pennsylvania proceedings, the Indiana prosecution resulted in a murder conviction and a death sentence. His reported religious delusions and previous insanity finding were known, but the court did not accept them as sufficient reason to excuse the killings.
Accounts associated with Heller’s confession portrayed him as believing that a divine power had directed his actions. Such statements may reflect genuine mental illness, an attempt to explain his crimes, or a mixture of both. Whatever his mental condition, the court concluded that he could be punished under the law.
The case attracted enough attention for a twenty-two-page account titled The Life and Confession of Isaac Heller, Alias Isaac Young to be printed in 1836. Its title described him as the murderer of his wife and three infant children and included information about his trial and sentence. The publication became one of the principal historical records of the case.
Execution
Isaac Heller was publicly hanged in Liberty, Union County, Indiana, on April 29, 1836. He was twenty-six years old and was only a few days away from his twenty-seventh birthday. Some modern databases give a different execution date, but the title of the contemporary 1836 confession and library catalog records identify April 29 as the date of execution.
Heller’s execution occurred only about two months after the murders of his family. The speed of the arrest, trial, sentencing and execution reflected the much shorter criminal process commonly found in nineteenth-century capital cases.
Historical Significance
Isaac Heller is sometimes classified as both a serial killer and a family annihilator. The serial-killer description is based on the separation between the murder of Catherine Muckeroy in Pennsylvania and the four murders in Indiana approximately six years later. The term family annihilator refers to his killing of his wife and all three of his children during a single episode.
The case also illustrates the limited treatment available for people considered dangerously mentally ill during the early nineteenth century. Heller had reportedly been found insane after his first known murder, yet he later escaped or left confinement and was able to relocate under another name. His subsequent crimes demonstrated the deadly consequences of that failure to keep him securely confined.
Although many details have been lost with time, the central facts are clear: Heller killed a child in Pennsylvania, avoided a criminal conviction because of insanity, adopted another name, moved to Indiana and later murdered his wife and three children on February 27, 1836. He was convicted and hanged in Liberty on April 29, 1836. His five known victims remain the most important part of the history, and their names distinguish the human lives behind an otherwise distant nineteenth-century crime.
