A serial killer is typically a person who commits crime more than once, and there is usually a time period between the crimes. A number of psychiatrists and FBI agents tried to find the reason why a person would have a call to murder one after another, and they came to the conclusion that every  case  is different. Some serial killers may be thrilled by anger, some by financial gain or sometimes simple lack of attention. Here are the top serial killers you should know about:

1. H.H. Holms

Holms was  one of America’s first serial killers who was documented after death. He was well-known for killing more than 200 people in the late 19th century. He murdered all his victims in World’s Fair Hotel which he owned and managed. The building later  was named “Murder Castle”.

2. Albert Fish

This picture of Albert Fish was taken in 1903. He was famous for his different nicknames, including “The Brooklyn Vampire”, “Moon Maniac,” or “The Boogey Man”. He lived in New York and was charged with 10 counts of murder. He was also accused of cannibalism and sado-masochism.

3. David Berkowitz

When police arrested Berkowitz in 1967, he was doing his best to prove his innocence. However, when more evidence emerged, he confessed to six killings. He told the authorities that he had no intentions to kill anyone, but he had to do it to honor his father.

4. Ed Gein

The criminal investigation at Gein’s house revealed a big number of candles, lampshades, belts, and gloves stored inside. These products were made of human bones and skin. According to the police record, he killed 3 people and robbed more than 20 graves during his criminal career.

5. Aileen Wuornos

Aileen Wuornos is considered to be the most notorious female serial killer of all times. She murdered seven men of  ages 40-65. Her picture was taken in Florida in 1889. Hollywood actress Charlize Theron played her character in the movie “Monster”. Another documentary was filmed named “Aileen: Life and Death of a Serial Killer”.