A chilling new true crime story is out on Netflix today documenting one of America's worst serial killers.
Capturing The Killer Nurse tells the story of convicted serial killer Charles Cullen, who admitted to killing up to 40 patients during his 16-year career as a nurse across many hospitals in the US. Watch the teaser trailer below:
More chillingly, experts believe that Cullen could have killed up to 400 people, though he has never admitted it.
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In the 94-minute documentary, viewers will be told the story of the serial killer, with interviews from Cullen himself, his co-workers, detectives who worked on the case, victims' family members, and his co-worker Amy Loughren, who played a key role in taking him down.
Cullen's troubled life started from childhood when he lost both his mother and father before he had turned 18.
Before he became an adult, he claimed that he attempted suicide and was sent to a psychiatric hospital.
Cullen decided to enter the medical profession after a brief spell in the navy, and this is where his horrific crimes began.
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After graduating from Mountainside Hospital's nursing school in Montclair, New Jersey, Cullen started working in the burns unit of Saint Barnabas Medical Center in Livingston.
His first murders took place at the center, with the killer admitting that he administrated a fatal drug through the IV drip of one patient, and a fatal dose of insulin to another.
When authorities started to question the deaths, Cullen packed his bags and left for a job at Warren Hospital, Phillipsburg - something that became a common theme throughout his career.
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At Warren Hospital, Cullen started using the drug digoxin, which is normally used to treat irregular heartbeats.
However, he gave a high dose to three innocent elderly women, who later died.
And while at Somerset Medical Center in Somerville, New Jersey, he murdered eight people between February and June 2003.
After being suspended for a year after pleading guilty to trespassing, Cullen returned to Warren where he continued his crimes for many years until he caught in 2003.
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After an internal investigation, two detectives were altered to the suspicious deaths.
After help from Loughren, whose perspective is followed in Netflix's more recent series The Good Nurse, detectives had enough to charge Cullen and was arrested in December 2003.
In March 2006, the killer was sentenced to 11 life sentences and a further six after that.
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He remains in prison to this day and isn't eligible for parole until 2388.
Topics: True crime, Netflix