Karen M. Davis was a New South Wales Police Officer for twenty years. At the age of nineteen, she started her career in uniform on the streets of Newtown, in the inner west of Sydney. She later became a detective, working in various squads within the State Crime Command, investigating serious and organised crime.

As an undercover operative, Karen was involved in numerous role-play situations for homicide investigations that led to murder convictions. She has infiltrated crime syndicates and purchased drugs from criminal entities including bikies and their associates.

In 2007, Karen was discharged from the police force with chronic Post Traumatic Stress Disorder. Her mother, (author of twelve novels, the late Lynne Wilding) encouraged her to write about her police experiences as a form of therapy. Creating her own little book of memoirs uncovered a love of writing and using her real life police experiences is the inspiration for her stories. "Fiction derived from reality."

Karen's first fictional crime novel Sinister Intent was released in 2013. This was followed by Deadly Obsession, 2014 and Fatal Mistake, 2017. All three novels feature Detective Lexie Rogers and are set in Sydney. They are stand-alone books or can be read as a series.