Nineteen-year-old pregnant Minnesota teen, Monalisa Perez was charged Wednesday with second-degree manslaughter after she fatally shot her 22-year-old boyfriend, Pedro Ruiz III on Monday while the couple were recording a YouTube stunt for her video blog.

Charges against Perez include a felony that could lead to a maximum sentence of 10 years and a fine of $20,000 or both.

Perez’s charge was described in a criminal complaint which said: "On or about June 26, 2017 in Norman County the defendant caused the death of another by the person’s culpable negligence whereby the person created unreasonable risk, and consciously takes chances of causing death or great bodily harm to another."

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The incident took place Monday, around 6:30 p.m. EDT at the couple’s home in Halstad, Minnesota, following which Perez called 911 and reported they were making a YouTube stunt video when she accidentally shot Ruiz in the chest. Ruiz was declared dead on the scene.

He held up a hardcover encyclopedia to his chest trying to block the bullet from reaching him. Perez shot him with a gold 50 caliber Desert Eagle handgun and the bullet traveled through the hardbound book and fatally injured Ruiz. The handgun is said to be one of the most powerful pistols in the world.

The entire scene was captured Monday, as the couple had reportedly set up a GoPro camera on the back of a car and another on a ladder nearby. A tweet on Perez’s account earlier Monday said the incident occurred after Ruiz wanted to make a video of their stunt in order to increase the fan following on their YouTube channel.

"The case remains under investigation by the Norman County Sheriff’s Office and the Minnesota BCA," Norman County Sheriff Jeremy Thornton told NBC News in a statement.

Ruiz had reportedly practiced shooting books and showed Perez that a bullet did not go through one and that they could go ahead with the stunt, NBC News reported.

The pair had been making and posting videos on YouTube since May for their channel called "La Monalisa." They already had a 3-year-old daughter and Perez is pregnant with another child, according to their YouTube channel and Perez’s personal account on Twitter.

"Imagine when we have 300,000 subscribers," Perez told Ruiz in the last video they made together. "They’ll be like, ‘Oh my god, hi!,’" according to NBC News. Their most recent video was titled "Doing Scary Stunts At the Fair Part 1" and their YouTube channel is filled with videos that were described as pranks, stunts and challenges.

"Our Vlogs will show you the real life of a young couple who happen to be teen parents. From highs to lows. Achievements to struggles. Join the fun, Follow our journey!" was written on the couple's "About" page on the channel.

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The video of the fatal shooting filmed by the couple will not be released, NBC News reported.

Ruiz’s aunt, Claudia Ruiz told CBS affiliate Valley News Live the pair was known to play pranks or perform stunts and upload them on their YouTube channel.

"They were in love, they loved each other," she said. "It's just a prank gone wrong. It shouldn't have happened like this. It shouldn't have happened at all."

"The fact that she's got to live with this for the rest of her life, that alone is a charge to me," Claudia added.

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