By Sally Garcia, EnStarz | Jun 11, 2012 02:01 PM EDT
Kris Humphries' lawyers contacted FBI agents Friday, claiming his ex-girlfriend Myla Sinanaj tried to extort him.
Sinanaj reportedly demanded "a large sum of money," or else she'd release information to the media that could hurt Kris' public image, according to celebrities site TMZ.com
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Sources close to Myla say she has emails, texts and other documents chronicling their relationship that could hurt, according to the site.
"Myla threatened that if she didn't get money she would "ruin" Kris," sources close to the NBA player told TMZ.
Humphries' lawyers were reportedly negotiating with her a non-disclosure agreement but they turned to the FBI after negotiations failed.
Kim Kardashian's estranged ex-husband and Myla have hooked up since mid-January.
According to celebrity news site TMZ, the pair met at a 5-star hotel in New York where she works. She was recently pictured with Humphries on a beach in Miami.
Myla, who bares a striking resemblance to Kim Kardashian, was reportedly pressuring Kris for a commitment but he didn't want to because he is enjoying being single, the source told RadarOnline.
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