Woman admits killing boyfriend in YouTube prank gone wrong

A woman who shot her boyfriend dead in a YouTube prank gone wrong has pleaded guilty to second-degree manslaughter.

In June, then 19-year-old Monalisa Perez shot Pedro Ruiz, 22, in the chest from only 30cm away, killing him. They expected the bullet to be stopped by a book.

The pair had acquired a small online following for their pranks, and hoped the deadly stunt would be their big break.

"It was just a prank gone wrong," Mr Ruiz' aunt Claudia Ruiz told Valley News Live at the time. "It shouldn't of happened like this. It shouldn't have happened at all."

The gun they chose was a .50 calibre Desert Eagle pistol - which experts say is more powerful than most other guns the same size, and a popular choice in violent video game franchises like Grand Theft Auto and Far Cry.

Perez had only a month earlier revealed in a video she and Mr Ruiz were expecting a baby.

Hours before the shooting, she tweeted the stunt was "HIS idea not MINE".

Her plea deal suggests she'll serve six months in prison and 10 years' supervised probation, and will be banned from owning firearms for life. She will also be banned from profiting from the video of the incident, which was used as evidence by prosecutors.

Her sentencing will take place in February.

The family said in June Perez planned  to name the boy after his deceased father.