Warren Sapp's Escort -- Upscale Sex Scam Artist ... NYPD Says

One of the escorts in the Warren Sapp hooker bust was arrested by the NYPD last year -- after cops say she ran an upscale sex scam ... and fleeced rich dudes out of tons of cash and jewelry.

The female (alleged) mastermind is Quying Boyd -- a 34-year-old escort who cops say ran her operation out of Manhattan in 2014.

According to police, Boyd would lure rich guys to their hotel rooms under the guise they were gonna bang -- only to swipe everything from money to credit cards to watches when they weren't looking.

Cops say Boyd jacked at least 3 dudes ... and scored more than $50,000 in cash and prizes (including a $40k Roger DuBuis watch).

She was eventually arrested in both 2013 and 2014 and charged with grand larceny ... but later released.

Which brings us to Arizona ... where she wound up in a room with Sapp -- though she claims she did NOT perform any sexual acts on the guy ... and has not been accused of stealing anything.