Not much is know about Zhang Yongming's life before he became a cold-blooded serial murderer.
One of the few records on him states that, before the string of killings, he was arrested and convicted of a single homicide and sentenced to death in 1979.
But after receiving sentence reductions, he was released in September of 1997.
In early May of 2012, reports of missing teenagers in the Yunnan Province of China sparked an investigation by the Ministry of Public Security.
Through this, one of the teenagers, 19 year old Han Yao, was confirmed to have been murdered.
During the investigation, it was believed that all these young males had been attacked in a particular road near Zhang's home.
Reports from residents of the village seeing Zhang hang plastic bags in his house with what appeared to be bones in them only aroused more suspicion from the authorities.
His house was searched, and inside they found human eyes preserved in jars and dried flesh.
It was rumored that he would feed his victims' flesh to his dogs as well as sell the remainder at a local market-
Claiming that it was ostrich meat.
Zhang was sent on trail for the murders.
Being unapologetic and having shown no remorse for his actions.
He was found guilty and executed on January 10th, 2013.
The Long Island Serial Killer, or The Craigslists Ripper, is an unidentified serial killer who murdered 10-16 people
in the Long Island area of New York within the span of 20 years.
Before the investigation, police were looking for Shannon Gilbert,
a 24-year-old New Jersey woman who worked as an escourt and was visiting a client.
Her driver, Michael Pak, watched Gilbert run out of the client's house and into the night.
Pak tried calling 911 and asked the surrounding neighbors if they had seen her.
But the trail ran cold and she was offically reported as missing on May 1st, 2010.
Then, in December of that year, during a routine training exercise, a police dog led an officer to a nearby area
where it found the skeletal remains of a female in a burlap sack.
From there, more bodies were found in the same area, leading the police to a full investigation.
In only a few months, four more bodies were found
and the serch area was expanded all the way to the county borders.
September came around, and a few of bodies were identified, allowing police to release a few composite sketches of a couple victims:
an unnamed Asian man and a Jane Doe, as well as some of the accessories worn by the victims,
were released to the public, hoping that this would provide tips, or a lead, on this strange case.
On December 2011, the remains of Shannon Gilbert were found in a marsh not too far from where she disappeared.
It's believed she died by drowning the in marsh, which her mother and several others find hard to believe.
Some of the neighbors do report seeing her run into the night screaming,
as well as a 911 call from Gilbert, begging for her life
that contradicts the accidental death conclusion.
Many suspects have come up in the case and, by 2015, the FBI were offically involved.
However, the killer still remains anonymous.
It's suggested that he is a man in his mid-20s to mid-40s, has knowledge of law enforcement which he uses to avoid being caught,
and is very familar with Long Island.
More specifically ... the south shore.
Probably better known as the Cleveland Strangler, Anthony Sowell murdered 11 women in the Cleveland area from 2007-2008.
and, perhaps, even earlier than that.
In 1989, shortly after being discharged from his work with the Marines, Sowell met a three-month pregnant woman at a motel.
He convinced her to accompany him to his home where he held her against her will,
gagging her with a rag and raping her several times.
Once Sowell retired to bed, the woman was able to escape and alert the police.
He was found guilty for this attack as was sentenced to 15 years in prison, eventually being released in 2005.
A few years later, he invited a woman he knew over to his house to socialize.
Sowell turned violent and began to physically and sexually assualt her.
About a month later, police showed up at his house with a warrent to arrest him with the sexual assult,
but he was nowhere to be found.
What they did find, however, were to bodies on his living room floor.
Two doay later, Sowell was tracked down and arrested.
Upon further investigation of his home, the bodies of four other women were uncovered,
found is shallow graves in the basement and stuffed into crawlspaces.
Then, digging in his backyard, uncovered three more bodies as well as the remains of a fourth victim.
Finally, a human skull was found in a bucket in the house, bringing the body count up to 11.
Sowell, charged with 11 counts of aggravated murder, was sentenced to death after a long and complicated trial period.
He remains on death row to this day>
Todd Kohlhepp had a very troubled childhood.
In preschool, he would destroy other children's things, and show signs of very aggressive behavior toward them.
By nine years old, his behavior only got worse.
He'd be cruel to animals; shooting his dog with a BB gun or using Clorox to kill his goldfish.
His father was quoted, saying that his son had one emotion ...
... anger.
By age 15, he kidnapped a girl in Tempe, Arizona, with a .22-caliber revolver.
He then took her home, tied and taped her up, and raped her.
The, he took her home, where he threatened to kill her sisters if she told anyone about what happened.
However, he was caught and sentenced to 15 years in prison for kidnapping and was placed on the sex offender list.
Upon release in 2001, he moved to South Carolina to live with his mother.
Two years later, four people were shot to death inside of Superbike's Motorsports, a motorcycle shop in South Carolina;
the victims being the owner, the service manager, the mechnic, and the bookkepper.
Kohlhepp was known to have a terrible history with the workers of this shop
with the owner's wife describing him as being a disgruntle customer who visited the shop frequently.
Then things went silent, until August of 2016, when Kayla Brown and her boyfriend, Charles David Carver,
suddenly vanished after going to Kohlhepp's house to clean it.
A few days later, investigators found the two after tracing their last known phone signals, leading them to the house.
It was there where they found Carver dead with multiple gunshot wounds and inside of Kohlhepp's shed.
They found Brown chained to a shark cage, unharmed but scared.
She told them how she watched Kohlhepp shoot Carver for, "having a smart mouth," and before locking her in the shed,
adding that he diddn't hurt her because she had done nothing wrong.
Following Kohlhepp's arrest, two more bodies were found on his property, and he later confessed
to the motocycle shop murders, bringing his body count to seven.
His first court date was scheduled for early 2017.
Stephen Port, also dubbed the Grinder Killer, was a Brittish serial killer who used dating sites to lure in his victims between 2014 and 2015.
His first victim was Anthony Walgate, an escourt he had met at Barking Station who eventually accompanied him back to his flat.
Two days later, Walgate was found dead on the streets in front of Port's property.
However, the connection between the two initially went unnoticed.
After this, between August 2014 and September of the next year, Port continues to meet people on the dating app Grinder,
with two of his victims, Gabriel Covari and Daniel Wentworth, meeting him only weeks apart from each other.
Once both men were murdered, Port planted a fake suicide note on Wentworth, making it seem like he killed Covari and then killed himseklf out of guilt.
Eventually, he met his final victim, Jack Taylor, whom he murdered and left in a church yard not far from his home.
Postmortem examinations showed the use of a number of different drugs on his victims.
But what stood out the most was a date-rape drug that Port would put into the drinks of all his victims to knock them out.
Police were eventually able to connect Port with the various murders.
And in November of 2016, he was found guilty of both sexual assualt and murder
and is now carrying out a life sentence.