When thinking about well-known serial killers, Pennsylvania is unlikely to pop up in your mind, even though they have the 7th most serial killer victims in the United States.

Instead, your mind probably thinks of Florida, California, or maybe even Wisconsin, home to some of the states’ most horrific killers. But Pennslyvania has its fair share of brutal and horrible murderers as well.

While this list is incomplete, as there will always be serial killers who fall through the cracks or remain uncaught, here are thirteen of the worst serial killers Pennslyvania has to offer.

Dr. Morris Bolber

• Number of Victims: 30 – 50+
• Dates of Murders: 1932 – 1939
• Birth Date: January 3, 1886
• Death Date: February 9, 1954
• Status: Sentenced to life in prison, May 25, 1939

Born in 1886, Dr. Morris Bolber became a member of the Philadelphia Poison Gang, run by two cousins, Herman and Paul Petrillo, sometime in the late 1920s and early 1930s.

Working with other members of the Poison Gang, Bolber helped sell “potions” to wives who were murderous, unhappily married, or just plain out superstitious.

Alongside these murderous concoctions, the gang worked with insurance agents, selling life insurance plans to the women, but the policies were made to benefit the gang members.

From 1932 to 1939, the gang successfully murdered hundreds of people, with Bolber directly connected to 30 – 50 of those murders.

In May of 1939, Bolber and the other gang members were captured and sentenced to life sentences without the chance for parole.

Bolber died in his prison cell on February 9th, 1954.

William Dean Christenson

• Number of Victims: 4+
• Dates of Murders: 1981 – 1982
• Birth Date: September 24, 1945
• Death Date: October 31, 1990
• Status: Received life in prison in 1983

William Dean Christenson was born on September 1945 and became a vicious serial killer between 1982 and 1983.

During his early years, 1969 – 1981, Christenson spent most of those years in prison after raping and stabbing a young woman 19 times. She managed to survive, and he served a single year.

Four years later, in 1974, he and a buddy kidnapped and repeatedly rapped another young woman, earning him another six years in prison.

Following his release, he spent more time in prison due to falsified passport information and raping another woman in Montreal.

Fast forward to 1982, he began the murders that would earn him the title of the American Jack the Ripper. For the next year, he would brutally slay three young women and a young man.

He died seven years after his arrest and incarceration in prison, though his death was not reported until nearly a full year later.

Juan Covington

• Number of Victims: 3
• Dates of Murders: 1998/2005
• Birth Date: March 3, 1962
• Death Date: Still Alive
• Status: Received three life sentences and is currently imprisoned at State Correctional Insitute in Rockview, Benner Township, Pennsylvania.

Born March 3, 1962, Juan Covington was responsible for the deaths of three people via shootings and two others being wounded.

He is reported to have been normal until his father’s death in 1990, which brought on depressive episodes, made worse by his paranoid schizophrenic.

Spaced out across seven years, he was finally captured on July 12th, 2005, and was given three life sentences which he is currently serving.

Charles Edmund Cullen

• Number of Victims: 29 – 45
• Dates of Murders: 1984 – 2003
• Birth Date: February 22, 1960
• Death Date: Currently Alive
• Status: Serving 18 life sentences

An Angel of Death, Charles Edmund Cullen, born February 1960, worked as a nurse at several facilities, including Saint Barnabas and the Warren Hospital.

From 1984 to 2003, Cullen murdered at least 29 of his patients “to ease their suffering” and is suspected of committing several hundred more.

He accomplished his murders by contaminating IV bags, and giving overdoes of medications like insulin and digoxin.

He was finally captured on December 15th, 2003, and was given 18 life sentences without the chance for parole, which he is still serving.

Jeffrey Joseph Daugherty

• Number of Victims: 5
• Dates of Murders: February – March 1976
• Birth Date: 1955
• Death Date: November 7. 1988
• Status: Executed by Electric Chair in Florida

Born in 1955, Jeffrey Josephy Daugherty was responsible for the deaths of five women during a trip he took from Michigan to Florida with his uncle and girlfriend.

During that three-week trip, he would murder four women to steal their pocket money and for the thrill he got from taking another’s life.

His final victim, a hitchhiker named Lavonne Sailor, led to his capture and execution by the electric chair on November 7th, 1988.

Harrison Graham

• Number of Victims: 7
• Dates of Murders: 1986 – 1987
• Birth Date: October 9, 1958
• Death Date: Still Alive
• Status: Living out a life sentence at SCI Coal Township

A native of Philadelphia, Harrison Graham was born October 9th, 1958; he had a less-than-perfect childhood due to an intellectual disability that led to him dropping out of school in the 10th grade.

In 1983, he rented an apartment where he, along with the other residents, sold and bought drugs, with his apartment becoming a drug den.

Four years later, when he refused to let his landlord enter after complaints of a foul stench, it was discovered that he had murdered seven women.

He admitted to giving them drugs during sex before strangling them and keeping the bodies in his apartment.

At first, given the death sentence, it was reduced to life in prison, which he is still serving, due to his intellectual disability.

Anthony Joyner

• Number of Victims: 6 – 18
• Dates of Murders: January – July 1983
• Birth Date: May 26, 1959
• Death Date: Still Alive
• Status: Serving a life sentence at State Correction Institute, Phoenix, Skippack Township, Pennsylvania

Anthony Joyner was born on May 26, 1959, with little of his early life being known. Considered portly and weak, he had little luck with women, with some people even thinking he was homosexual.

Lacking higher education, he would work low-level jobs, with his final job being at the Philidelphia Kearsley Home, Christ Church Hospital, as an assistant nutritionist.

Considered to be a friendly and good fellow, in 1983, he would murder at least six elderly women, though he is suspected of having killed as many as 18.

His reign of terror lasted from January to June before being apprehended and sentenced to life in prison, which he is still serving.

Timothy Wayne Krajcir

• Number of Victims: 9
• Dates of Murders: 1977 – 1982
• Birth Date: November 28, 1944
• Death Date: Still Alive
• Status: Serving 13 life sentences at Pontiac Correctional Center

Born November 28th, 1944, Timothy Wayne Krajcir murdered nine women, five of whom were killed in Missouri, and the last four were murdered in Illinois and Pennslyvania.

These crimes were committed between 1977 and 1982, but he was not captured until 2007 after DNA testing had advanced enough to connect him to DNA evidence left behind.

He now serves 13 consecutive life sentences at the Pontiac Correctional Center in Portland, Illinois.

Peter Kudzinowski

• Number of Victims: 3
• Dates of Murders: 1924/1928
• Birth Date: August 13, 1903
• Death Date: December 21, 1929
• Status: Executed by electric chair

Peter Kudzinowski was born August 13, 1903, to Polish immigrants in Dickson City, Pennsylvania. In sixth grade, he suffered from a skull fracture which caused his behavior to change, including a refusal to attend school any longer.

In 1924, he murdered 20-year-old Harry Quinn before murdering 7-year-old Julia Mlodzianowski sometime between 1924 and 1928.

The murder that led to his capture was of 5-year-old Joseph Storelli in 1928, followed quickly by his execution by the electric chair only a year later.

John Martini, Sr.

• Number of Victims: 6
• Dates of Murders: 1977 – 1989
• Birth Date: July 30, 1930
• Death Date: September 10, 2009
• Status: Died in prison at New Jersey State Prison

John Martini, Sr. was born July 30, 1930, and murdered six people, including his aunt and uncle, Teresa Marie Dempster and Irving Flax.

He was apprehended in 1989 for the kidnapping and murder of Irving Flax and was given the death sentence.

After several years of appealing his case, in 1995, he requested his execution date be sped up as he hated the long prison sentence.

When it came down to the last six weeks before his death sentence, he began appealing his case again, but they were denied, and the death sentence was re-affirmed.

Before his execution, though, he died in his prison cell on September 10, 2009, at the New Jersey State Prison.

Herman Webster Mudgett (Dr. H. H. Holmes)

• Number of Victims: 27+
• Dates of Murders: 1886 – 1894
• Birth Date: May 16, 1861
• Death Date: May 7, 1986
• Status: Executed by hanging

Herman Webster Mudgett, better known as H.H. Holmes, is considered America’s first true serial killer, though this is not the case as his murders happened after those of Thomas Neill Cream.

Born on May 16, 1861, he would go on to torture and murder potentially hundreds of victims, though only 27 have been confirmed, in his Chicago Hotel.

On many of these victims, he took out insurance policies that he collected after their untimely demise, which would have led to his discovery if his murder hotel had not burned down.

He was apprehended and then hung on May 7, 1986, at Moyamensing Prison in Philidelphia.

Harvey Miguel Robinson

• Number of Victims: 3
• Dates of Murders: 1992 – 1993
• Birth Date: December 6, 1974
• Death Date: Still Alive
• Status: On Death Row at State Correctional Institute, Phoenix

Born on December 6, 1974, Harvey Miguel Robinson began his murder spree when he was only 18, killing three people and wounding two others.

His father was physically and emotionally abusive toward his mother, potentially leading to his violent tendencies.

After being apprehended in 1993, he was sentenced to death, which was stayed in 2006. Seven years later, in 2013, he was placed on death row again, where he is currently serving until his eventual death.