The teen revealed that she had first met Carrizo on VampireFreaks in June 2012 two years after the man had been arrested for child porn. They knew each others true age, the girl told detectives.
Over the months, Carrizo asked her several times if she was a cop and if this was a setup, the warrant said. She sent him nude photos to prove she was not.
Then in December two months after he had pleaded guilty Carrizo began urging her to come to Miami for sex.
The teen admitted sneaking out of her home twice in early January, taking her mothers car and driving to Miami to have sex with Carrizo, according to the warrant.
Carrizo lives with his mother in a Surfside apartment. When she snuck in, his mother was asleep on the couch, she recalled to detectives.
Carrizo created his VampireFreaks profile in February 2012, according to the website.
We enjoy the night, the darkness, where we can do things that arent acceptable in the light, he wrote. Night is when we slake our thirst.
This is not the first vampire-themed underage sex case in Miami-Dade.
In 2011, authorities arrested Christopher Rodriguez, of Homestead, after he hopped a trained to Virginia with a plan to seduce his 14-year-old online girlfriend and drug her mother with sleeping pills. Rodriguez, 28 at the time, met the girl through the online vampire role-playing site Reign of Blood.
Last month, Rodriguez was sentenced in Virginia to 15 years in prison.
As for VampireFreaks, the website claims 1.7 million users, who create profiles similar to how Facebook operates. In 2008, it even opened a New York City clothing store (it closed three years later).
But like other social networking sites, VampireFreaks has come under scrutiny because of bizarre and violent criminal behavior linked to users.
The most high-profile case: In 2007, 15-year-old girl, Carly Ryan, was found murdered in South Australia. She met her killers, a father-and-son duo, through the website.
In 2006, a 12-year-old Canadian girl and her 23-year-old boyfriend, both users of the site, were arrested and later convicted for the murders of her parents and 8-year-old brother.
In May 2010, Minnesota authorities charged a Scottish man with exchanging sexually explicit photos with a 14-year-old girl through the site. The man, who was not extradited, went by the online moniker: Master Alucard Dracula spelled backward.