Only A True Crime Expert Will Know If These Cases Were Solved Or Not

After finding human remains on his farm in 2002, investigators were finally able to arrest Robert "Willy" Pickton. Although Pickton has admitted killing 49 women and feeding them to his pigs, he has only been charged with six murders. In a strange twist of fate, he's eligible for parole in 2022.

While resting in his L.A. home in 1947, Bugsy Siegel was shot. Speculation still abounds about the murder, and no one knows if it was a mob-ordered assassination or a random stranger. To this day, the case remains unsolved.

Years after the tragedy, DNA evidence cleared any suspicions about Jonbenet Ramsey's parents being involved. Despite new leads and new suspects, the perpetrators have never been caught.

First dubbed "the .44 Caliber Killer," the Son of Sam's real name is David Berkowitz. In 1977, he was arrested, tried and convicted for the murder of eight New York residents. During his confession, he stated that he believed the murders were caused by a demon that lived inside his neighbor's dog.

Everyone has been looking for Jimmy Hoffa or his body since he disappeared in 1975. He was declared deceased in 1982, but rumor and speculation range from his body being buried underneath Meadowlands Stadium to his escape from the country. Will we ever know?

Payne Lindsey and crew simply wanted to bring light to the Ocilla, Georgia disappearance of schoolteacher Tara Grinstead. Little did they know when they began that new information would lead to the arrest of her murderers.

Through a series of letters sent to the newspaper in the late '60s, The Zodiac Killer struck fear across the country. Only six of the 37 murders he claims to have committed have been confirmed, but the mysterious killer has never been caught.

The $200,000 D.B. Cooper acquired through extortion would be worth over $1.2 million today! Enthusiasts and law enforcement are still trying to track him down, but no one has seen him since he parachuted out of a hijacked airliner over the forests of the Northwest in 1971.

On Jan. 15, 1947, Los Angeles was rocked by the discovery of Elizabeth Short's mutilated body in Leimert Park. One detective, Steve Hodel, is still investigating the case. He believes that the murderer was his father, Dr. George Hodel. No concrete proof has ever been found, though.

Crime enthusiasts everywhere are still trying to solve the Borden family murder case. In August 1892, Lizzie Borden's parents were found hacked to death with an ax. There's a lot of suspicion surrounding Lizzie and her sister, but nothing has ever been proven.

Rodney Alcala might have been a winning contestant on "The Dating Game," but he was a frightening person in real life. He has admitted and been tried for seven murders, but the 1,000s of photos he collected suggests that the body count could be much higher.

The case of missing 12-year-old Polly Klaas was the first case to use the internet to help find a missing child. Sadly, her body was found two months after she was kidnapped from a slumber party by Richard Allen Davis. Davis is currently serving on California's death row.

Between 1888 and 1891, 11 murders took place in the Whitechapel area of London. While no one has ever identified the suspect known as Jack the Ripper, new forensic evidence suggests the culprit was a Polish immigrant named Aaron Kosminski.

After three people perished, the Chicago area was frozen with fear during 1983's Tylenol murders. Although no one has been apprehended, the makers of the product (and many others) have taken it upon themselves to make packaging more tamper-resistant.

When the body of a prostitute was found drained of blood, authorities in Stockholm set out to find The Atlas Vampire. Despite their efforts, there were few leads and the killer was never found.

Documented in the chilling film "Don't F*%K With Cats," the internet cat killer turned murderer led both police and internet sleuths on a worldwide chase. Eventually, he was captured in Berlin and is now serving a mandatory life sentence in Canada.

In March of 1990, two thieves disguised as police officers entered the museum and tied up the guards. Including paintings by Rembrandt and Degas, over $500 million worth of artwork was taken. To this day, the suspects remain at large.

When Abraham Lee Shakespeare won a $30 million lottery payout, he was generous with it. There was seemingly no reason for his body to be found buried under a concrete slab on his property. Dorice "Dee Dee" Moore, his business partner, was convicted of the killing and sentenced to life.

Between May 1918 and October 1919, the New Orleans Axeman preyed upon immigrant families in New Orleans. Despite much speculation and panic, the serial killer has never been found. Legends and rumors still abound, though.

Chicago was paralyzed with fear from 1972 to 1978. During that period, 33 men and boys were murdered, but law enforcement was left puzzled until they got a huge break. Eventually, John Wayne Gacy was arrested and tried.

Also called The Butcher of Plainfield, Ed Gein passed away in a mental hospital in 1984. Although he was only convicted of two murders, many more are suspected. Upon first inspection of his home, officers found several chairs upholstered with human skin — and that was just the beginning!

With 12 deaths in the wake of their crime spree, only one of the Hillside Stranglers was arrested at first. Once Angelo Buono was in custody, he offered up the name of his accomplice. Both he and Kenneth Bianchi were sentenced to prison. Bianchi testified against Buono to avoid the death penalty.

A marker that reads "America's Lost Child" marks the spot where the Boy in the Box was found in Philadelphia. Since 1957, authorities have been trying to solve the heinous crime, but the guilty party has never been found.

For two successive years, in 1996 and 1997, the entertainment world was shocked by the shooting of Notorious B.I.G. and Tupac Shakur. The investigation still continues, but the shooter has never been found.

Dr. Harold Shipman is considered the most prolific serial killer of all time. The estimates say that he injected at least 218 of his patients with a lethal dosage of morphine. Since the year 2000, he has been serving a life sentence.

In a crime spree that lasted over 16 years, Gary Ridgway is the serial killer known as The Green River Killer. He was charged with 48 murders, but he has admitted to killing at least 71.

Also called the East Area Rapist and the Diamond Knot Killer, Joseph James DeAngelo murdered at least 13 people and committed 150 more heinous crimes. He was finally brought to justice, but not before going on a spree that lasted from 1974 to 1986.

In 1932, the disappearance of the Lindbergh baby was investigated by Norman Schwarzkopf, who was an investigator with the New Jersey State Police. Two years later, the family's contractor was arrested for the crime. After a salacious trial, Bruno Hauptmann was found guilty and executed by electric chair.

When he was apprehended in 1985, Richard Ramirez had left a trail of bodies across the city of Los Angeles. He was also the first person in the state of California to receive 19 consecutive death sentences.

If you answered no, you weren't entirely wrong. Although Wayne Williams has been convicted of killing two of the victims and admitted to many of them, many people remain unconvinced that he worked alone.

Between 1974 and 1971, BTK murdered 10 people. During spans of silence, he would send letters to the authorities that explained his name. BTK is short for bind, torture and kill. Legally named Dennis Rader, he has been sentenced to 10 consecutive life terms.

in 2016, Lonnie David Franklin, Jr. was sentenced to death row for taking the lives of up to 25 Los Angeles-area residents. His nickname doesn't come from his method of attack; instead, he was given the moniker for the 14-year pause he took between murders.

The Washington D.C. area was hit hard by the violence of the Beltway Sniper in October of 2002. Shooters John Muhammad and Lee Boyd Malvo were caught after killing 10, and Boyd is serving a life sentence. Muhammad was sentenced to death and executed in 2009.

Without any injuries, eight masked men stormed Schiphol Airport, boarded a plane and made off with over $50 million in diamonds. The investigation has been ongoing since the crime happened on Feb. 18, 2013, but they seem to have gotten away with it.

The world held its breath when 14-year-old Elizabeth Smart was abducted from her Utah home. Her captors, Brian David Mitchell and Wanda Barzee, were arrested in 2003. Mitchell is serving life, but his accomplice can be released in 2015.