Nothing is known about Kate's life before the outbreak, except that she lived in somewhere in Manhattan, New York and served as a SWAT officer.
"Bad White" Edit
In this episode Kate is seen talking to Fet about the vampires after they finshed their drinks. They had sex in a hotel room once it was morning Fet kissed her goodbye as he left.
As of the end of season 3 her status is unknown it is possible that she fled along with the other officers in New York