Nancy Gonzalez, the federal prison guard accused of becoming pregnant from New York City cop killer Ronell Wilson, has sent shock waves throughout the country for her alleged behavior. But the federal accusations against Gonzalez aren’t the first time a prison guard allegedly became pregnant or impregnated an inmate.

Gonzalez faces 15 years in prison for allegedly having sex with Wilson, a 30-year-old from Staten Island who was convicted of the 2003 execution-style killings of undercover detectives Rodney Andrews and James Nemorin.

According to a complaint filed by the U.S. attorney’s office in Brooklyn, Gonzalez was recorded having a telephone conversation with another inmate about how she became pregnant with Wilson’s child.

The prison guard allegedly said she was working in a unit where “there was an inmate there that for whatever reason, I took a chance because I was so vulnerable and wanted to be loved and now I am carrying his child,” according to the complaint.

Gonzalez, who found out she was pregnant in June, told the inmate she “kind of got sucked into his [Wilson’s[ world” and “felt like, well, why not give him a child as far as giving him some kind of hope.

Wilson, whose death penalty sentence was withdrawn for procedural reasons, allegedly wanted to get a woman pregnant before being executed.

At his 2007 trial, a friend of the cop killer said he received a letter from Wilson.

“I just need a baby before the pigz try to take my life,” the cop killer allegedly wrote, according to the New York Post. “I need to have something behind.”

Gonzalez allegedly complied with Wilson’s wishes and had sex with him over three weekends with the purpose of getting herself pregnant, according to the criminal complaint.

As Wilson awaits a penalty phase retrial for the murders of Nemorin and Andrews, some speculated that his plan to get the prison guard pregnant was a ploy to evade the death penalty.

Wilson’s attorneys are arguing he be spared death because he has a low I.Q. and executing him would constitute cruel and unusual punishment.

But Michael Palladino, president of the Detectives Endowment Association union, isn’t buying it.

"If this was done by design, it's not the actions of a person who is mentally retarded," he told the New York Daily News.  "It's a devious plot to avoid the death penalty."

Similar shock and outrage reverberated across the country over the story as news of Gonzalez being impregnated by a cop killer went viral Tuesday.

“I can’t believe she would be that crazy,” a former detective told the Post.

Gonzalez isn’t the first prison guard accused of becoming pregnant or impregnating an inmate.

In a similar case, a female prison guard in Sweden became pregnant by a convicted rapist in 2010 after carrying on an affair with the prisoner.

“We started talking to one another and afterwards it developed into a relationship,” the guard told Swedish newspaper Aftonbladet.

The woman told the paper that she forgave the then-38-year-old rapist for his crimes, which included a sex attack in the prison.

 “I know he was convicted for a rape in the visitors’ room, but that was three years ago,” said the guard, who no longer works in the Swedish prison.

Mike Tyson stirred controversy when he claimed last year that he got a prison guard pregnant while serving time on rape charges.

The former champion boxer alleged in an ESPN interview that the guard got pregnant but did not give birth to the child.

"I didn't talk about getting a prison official pregnant," Tyson told ESPN’s Rick Reilly about details he left out of an interview with the sports network. “Oh, yeah. In prison, stuff happens. But she had no baby."

In July 2003, a Las Vegas prison guard was placed on administrative leave as authorities investigated whether he impregnated an inmate at the Southern Nevada Women’s Correctional Center.

The inmate, described as a woman in her 20s, was four months pregnant when she made the allegations.

"She will have a reminder of this incident for the remainder of her life,” her attorney, Scott Olifant, said at the time. "They do not have to raise a baton or make any threat to intimidate an inmate.”

Like New York, Nevada law makes it illegal for prison guards to have sexual relations with inmates.

The behavior is a huge security risk, and authorities were concerned in Gonzalez’s case that she would be sympathetic to Wilson and aid him in an escape attempt.

To contact the editor, e-mail: