Pre-Employ Blog

Would You Recognize a Serial Killer Co-worker? 

Posted by Bob Mather on September 18, 2015

Yes, even serial killers had jobs. In Fact, one stole from his employer and stabbed a coworker, another installed home alarm systems to residents trying to protect themselves from... him.

In our line of work, we screen thousands of applicants for employers around the world. Not only criminal background checks, but also employment verification and references. In doing so, we uncover some of the most horrendous crimes imaginable. Few are as horrible as the 5 serial killers mentioned below. 

A recent internal discussion with our investigators about workplace got us wondering:

Where did the worst criminals of our country work? Would they have passed a background check? What do the co-workers think of them? WHat kind of background check would would they have had to pass? 

As a result We came up with the following list of serial killers and where the were employed at the time of their crimes or arrest: 

1: David Berkowitz:

David_Berkowitz Son of Sam Killer

David Richard Berkowitz (born Richard David Falco, June 1, 1953), also known as the Son of Sam and the .44 Caliber Killer, is an American serial killer convicted of a series of shooting attacks that began in New York City in the summer of 1976, perpetrated with a .44 caliber Bulldog revolver. He killed six victims and wounded seven others by July 1977. As the toll mounted, Berkowitz eluded a massive police manhunt while leaving brazen letters which mocked the police and promised further crimes, highly publicized in the press.

David Berkowitz letter to NYPDSon of Sam Letter to Police


He terrorized New York and achieved worldwide notoriety.

Berkowitz was arrested by New York City police in August 1977, and was indicted for eight shooting incidents. He confessed to all of them, and claimed to have been obeying the orders of a demon, manifested in the form of a dog ("Harvey") who belonged to his neighbor ("Sam"). Despite his explanation, Berkowitz was found mentally competent and incarcerated in state prison for murder. In the course of further police investigation, Berkowitz was also implicated in many unsolved arsons in the city.



2: Edmund Kemper 

State of California's Department of Public Works/Division of Highways in District 4 (now known as Department of Transportation or Caltrans)


6 foot 9 killer Edmund Kempered

Edmund Emil Kemper III (born December 18, 1948),[1] also known as Big EdThe Co-ed Butcher, or The Co-ed Killer, is an American serial killer and necrophile who was active in California in the early 1970s. He started his criminal life by murdering his grandparents when he was 15 years old,[2]and later killed and dismembered six female hitchhikers in the Santa Cruz area. He then murdered his mother and one of her friends before turning himself in to the authorities days later. Kemper is noted for his imposing size and high intelligence, standing 6 ft 9 in (2.06 m) tall and weighing over 300 lbs (140 kg) and having an IQ in the 140 range, attributes that left his victims with little chance to overcome him.


3: Lawrence (Louie)  Bittaker:  

Supermarket employee who stabbed coworker

4: Roy Norris:

US Navy and  Machinist /Electical Technician 

Bittaker and Norris


Lawrence Sigmund Bittaker (born September 27, 1940) and Roy Lewis Norris (born February 2, 1948) are American serial killers and rapists known as the Tool Box Killers, who together committed the kidnap, rape,torture and murder of five teenage girls over a period of five months in southern California in 1979.

Described by FBI agent John Douglas as the most disturbing individual he has ever performed a criminal profile upon,[ Bittaker was sentenced to death for five murders on March 24, 1981 and is currentlyincarcerated upon death row at San Quentin State Prison. Norris accepted a plea bargain whereby he agreed to testify against Bittaker and was sentenced to life imprisonment on May 7, 1980, with possibility of parole after serving 30 years. He is currently incarcerated at Donovan State Prison.

Bittaker and Norris became known as the Tool Box Killers due to the fact the majority of instruments used to torture and murder their victims were items normally stored inside a household toolbox.

Lawrence Bittaker has granted several death row interviews following his 1981 conviction. To date, he has never expressed any remorse for his crimes, and states the only remorse he feels is for the fact he and Norris were arrested. Bittaker has also marveled that he and Norris had little in common before their acquaintance at the California Men's Colony in San Luis Obispo in 1977, before adding that they have "one hell of a lot in common now!" In reference to one of the torture and murder implements he and Norris used upon their victims, Bittaker responds to letters he receives with the nickname, "Pliers" Bittaker.

As of 2015, Lawrence Bittaker remains incarcerated on death row at San Quentin State Prison.

Roy Norris remains incarcerated at Donovan State Prison. Since his conviction, he has repeatedly claimed the sole reason he participated in the murders was out of fear of Bittaker. Norris also claims to have twice contemplated confessing to his and Bittaker's responsibility in the murders to the police; he also claims to have successfully deterred three potential victims from entering Bittaker's van.

Norris claims that although he enjoyed the actual intercourse with the victims, only Bittaker enjoyed the act of torture and murder, stating: "I didn't enjoy killing—that was Lawrence [Bittaker]. It was his favorite part: watching the women struggle to live; knowing he'd soon be taking life away." (Both investigators and psychologists have stated Norris derived gratification from the domination, abuse and torture of his victims.


5. Dennis Rader (the BTK Killer)

  • United States Airforce
  • Leekers IGA Supermarket ( Bookeeper with his Mother) 
  • Coleman Company ( Assembler)
  • ADT Security Services ( Home Alarm Installer)
  • Census Field Operator
  • Dog Catcher ( Park City KS, employment terminated for failing to show up for work or calling in... He had been arrested for the murders 5 days before)

 Dennis rader

Rader ( The BTK Killer) installed security alarms as one of his many jobs; many of his clients Hired his employer to stop BTK from entering their homes, unaware that BTK himself was installing them.

Dennis Lynn Rader (born March 9, 1945) is an American serial killer who murdered ten people in Sedgwick County (in and around Wichita, Kansas), between 1974 and 1991.

He is known as the BTK killer (or the BTK strangler). "BTK" stands for "Bind, Torture, Kill", which was his infamous signature. He sent letters describing the details of the killings to police and local news outlets during the interval in which the murders took place.

After a long hiatus in the 1990s through early 2000s, Rader resumed sending letters in 2004, leading to his 2005 arrest and subsequent guilty plea. He is currently serving 10 consecutive life sentences at El Dorado

According to several reports, including his own confessions, as a child he tortured animals. He also harbored a sexual fetish for women's underwear and would steal underpants from his victims and wear them himself.