Christine Parker is a New York City police officer.
Parker took the "babysitting" duty too casually, eating a candy-bar and reading a Cosmopolitan. She disbelieved Hawkins' claim that there had been a strange flash of light from further inside the library, and remained in the lobby while he went off to investigate.
However the information desk just so happened to be where Bellos was teleported into. Though he initially mistook her for a contestant, he deiced to have his Hoodaya kill Parker anyway, and took her badge as a trophy.