These couples, the compelling combination of passion and blood, are the literal definition of loving each other's quirks. From the romanticized Bonnie and Clyde duo to the immortalized Lonely Hearts Killers, these couples live in infamy as they captured the public's attention with their daring escapades and unbreakable bonds reaching what it truly means to be a partner in crime.

1. Bonnie & Clyde

Bonnie Parker and Clyde Barrow in front of their car.Wikipedia

Bonnie Elizabeth Parker, an innocent girl from the South with a clean record, became madly in love with Clyde Chestnut Barrow, an ex-con. Together they formed a most astounding criminal duo in which they robbed gas stations, restaurants, and local banks, but never married.

Though their twenty-one-month crime spree was short-lived, it was awash in the blood of innocent police officers and night guards, and finally it ended in a halo of gunfire from the ambush orchestrated by police officers outside of Gibsland. Their lives seemed out of a movie, and much later, in various adaptions throughout history, it was.

2. The Lonely Hearts Killers

Raymond Fernandez, recently freed from jail due to petty theft, answered the calls of newspapers that advertised lonely women wanting to start a relationship with a man. Soon, Fernandez developed an M.O. (modus operandi): woo his victims, gain their trust, and then rob them to become nothing but a ghost. A mystery.

However, when he met Martha Beck, everything changed. Soon, Beck was at his doorstep, with her two children, begging Fernandez to be with her as her one true love and prince Charming.

Fernandez only agreed with one condition: if Beck abandonded her children. She of course did by dropping them off at a Salvation Army. And on they continued with their thefts using Raymond's M.O.

However, Martha being possessive of her lover, together, they started to kill the women in order for her to be the only one in Raymond's life. But, after the murder of a widow and her child, they were arrested and sentenced to the death in the electric chair. The lonely hearts killers are believed to be the culprits of as much as 20 deaths.

3. Leopold & Loeb

Richard Loeb, a smart, charming, and wealthy eighteen-year-old graduate student, was a mirror image of his friend and lover nineteen-year-old Nathan Leopold, who was a brilliant law student, a published ornithologist, and the heir to a manufacturing fortune. But despite their status quo, they became obsessed with pulling off the "perfect crime" for they considered themselves Nietzschean "supermen" in which laws were beneath the duo.

This belief led to the murder of Bobby Franks, Loeb's cousin. However, they soon proved to be horrible criminals, leaving a trail of evidence behind and after ten days of the murder, they confessed to it. They were arrested thought they escaped death row.

These couples, known for their dark minds and twisted intentions, will forever live in the infamy of our world.