Ted Bundy, Dennis Rader, Harold Shipman, Jeffrey Dahmer.
泰德•邦迪 丹尼斯•雷德 哈罗德•希普曼 杰弗瑞•达莫
Ian Brady, Myra Hindley, Gary Ridgeway, John Wayne Gacy, and The Zodiac Killer,
伊恩•布兰迪 米拉•新德利 盖里•里奇韦 约翰•韦恩•盖西以及十二宫杀手
are probably the most iconic serial killers of the 20th century.
But can you name a serial killer from the last 20 years?
Unless you’re a serial killing nerd, probably not.
The 70s, 80s and 90s were the heydays of American serial killing.
上世纪七 八 九十年代 是美国连环杀人案发生的高峰期
Now I’m using America as an example in this video,
nearly every western country follows a similar pattern
it’s just that you guys have the biggest data set
and if I may say so, a penchant for serial killing.
American has 4% of the world’s population
and 67% of the world’s serial killers
Here’s the yearly average for the number of operational serial killers in the US for each decade.
It exploded in the 1970s, peaked in ’87
20世纪70年代 人数激增 于1987年达到顶峰
and has been on a steady decline ever since.
We rarely hear about modern day serial killers.
Either there’s just a lot less around, they don’t get reported on,
or we’ve gotten really good at catching them.
Technology has made us traceable.
You try secretly eating 17 people today
without using a credit card, phone, or the internet,
all while avoiding CCTV.
Jeffrey Dahmer had it easy.
The ability to map suspects movements over the course of an investigation
has radically changed policing as has DNA profiling.
California had a spree of unsolved crimes between 1974 and 1986.
The police were looking for The Visalia Ransacker,
The East Area Rapist, The Diamond Knot Killer, and The Original Night Stalker.
But DNA breakthroughs in 2001 linked all 170 cases to the same man.
Now dubbed The Golden State Killer.
DNA allows police to connect unsolved crimes.
Let’s say they’re investigating five murders.
This is their search area.
But if all the crime scenes are found to contain the same DNA,
the killer is now likely to live somewhere in this smaller area.
with the decent chance of them being fairly central.
Connecting the crimes helps catch the murderer sooner, saving lives.
The Golden State Killer remained unidentified for over 40 years.
Eventually police created a fake profile on a genealogy website,
uploading The Golden State Killer’s DNA.
they found a handful of fitten for cousins
built a family tree and were able to know it don’t just a few suspects
In April 2019,Joseph James DeAngelo was finally arrested
in connection with 13 murders, over 50 rapes and 120 burglaries.
The term serial killer only entered popular usage during the case of Ted Bundy.
Between 1974 and 1978, he murdered over 30 young women across 7 states.
Multiple states had separate investigations,
all looking for a many of similar description with the same car ,
same victim profile，committing murders in the same way.
These investigations didn’t combine forces until after he was arrested.
It was a hard lesson in the importance of communication.
Departments in the FBI were set up to tackle these new types of murderers, using centralised databases.
If police suspected a serial killer
they would now submit a Violent Criminal Apprehension Program Report, or ViCAP.
This asked for information about the types of victims, witness descriptions,
locations,the time between murders,staging of quinsy
anything that could be characteristic to an individual killer.
All reports from across the country would be compared to each other,
looking for patterns and similarities between cases.
ViCAP was pretty successful and is still used today.
Although it’s changed a lot and has been plagued with issues technical and political.
Nevertheless it taught us
that combining resources and intelligence is vital to catch serial killers.
Organisations like Interpol now share data across multiple countries,
widening the net even further.
Police aren’t the only ones to change. So have we.
Hitchhiking has all but died out, people speak to strangers less,
and young women rarely walk alone in the woods anymore.
The thought of maybe being murdered by that guy behind you
has become increasingly common.
We take more precautions and less risks.
Yet ultimately serial killing declined
because technology, science, and police procedure are catching murderers sooner.
Potential serial killers are being caught and imprisoned immediately after their first murder.
Or for a different crime, before they even have chance to start killing
And once they’re in prison they’re more likely to stay there.
Prison sentences for violent crimes have gotten longer and parole has been reduced.
Dr. Micromof from the Serial Killer Database says:
” Not quite 20 % of our serial killers were people who had killed,
gone to prison, been released and killed again.”
By the way, the Serial Killer Database is fantastic.
They have a report comparing IQ scores to killing methods.
I’ll link it with the sources below.
Since 1987 there’s been a 85 % reduction in the number of US serial killers.
there is still plenty around between 20 and 50 a quarter year
But when they are caught they have a lot less victims.
If Ted Bundy was around today
he wouldn’t have been able to kill so many women
and he wouldn’t have gained the same knowability.
To be a famous serial killer now,
you’ve really got to push the boat out.
Your common or garden serial killer just doesn’t make national headlines anymore.
There have been lots of key developments, evidence, and change of procedure
you can directly point to–to explain the reduction in serial killer.
But the real mystery isn’t ‘where did all the serial killers go?’
It’s ‘where did they come from?’
A key difference between serial killing and your average homicide,
is that victims and their killers are usually strangers.
Serial killers often seek out areas where they’re unlikely to know people.
Kevin Haggerty and Ariane Ellerbrok
make a case with The Society of Strangers.
The idea being that the 50s and 60s saw unprecedented migration to urban areas.
People went from growing up in small towns where everyone knew everybody,
to cities where they fest majority of the people they might were unknown
This provided potential serial killers with a wide pool of victims,
while at the same time granting them anonymity.
another saving is serial killers just begin copy each other.
The 60s also saw the popularisation of TV news,
true crime documentaries,books and magazines.
Mass communication allowed stories about the latest murder to spread,
gripping the nation like a TV soap.
By the time Ted Bundy appeared on the scene
a celebrity culture had grown around serial killer.
A young would-be serial killer
may have found the potential glory and attention intoxicating.
In summary the 60s saw huge societal shifts
that led to a monumental increase in serial murder,
and it took 40 years for science, technology, and police to catch up.
然后花费四十年 借助科学 技术与警方的力量将杀手缉捕归案
He would be arrogant to think we now have serial killing under control.
many countries around the world are still seeing continued growth –
The recent decline is the Western phenomenon.
There is no reason it couldn’t increase again.
After all, we’re currently undergoing our own huge societal shifts.
more and more serial killers today find them victims online
it would be a lot more careful about their movements and meeting places
The serial killer handbook is constantly changing
and we need to change with it.
In this video I said the word”
serial killer”,”serial killer” 34 times,” murder” 13 and”rape” twice.
34次“连环杀手” 13次“谋杀” 2次“强奸”
There’s no way it isn’t getting demonitised by YouTube.
So I would like to say a big thank you to Joe Chamberlain and all my supporters on Patreon,
所以我非常感谢 Patreon 的乔•张伯伦和所有支持者
who are the only reason I’m able to make videos like these.
If you want to support the channel,
check out the link and thank you for subscribing.
Ted Bundy, Dennis Rader, Harold Shipman, Jeffrey Dahmer.