Katherine John is a very much darker person than Catrin Collier. Interested in the human psyche, and the reasons that motivate people to commit crimes.
She is fortunate to have many police officer and pathologist friends, who have given her insights into their work and the trauma that is part of their daily lives. Trauma that would drive many lesser people to insanity - and officers like her creation Peter Collins to make highly inappropriate remarks at inappropriate times.
She is often invited to talk about creative writing, writing crime and the events that inspired her crime books. Prisons and prisoners are among her favourite venues and audiences because on leaving she always feels that she has learned far more from the inmates than they have from her.
Her crime book, By Any Name, written as Katherine John, starring Cengiz Dervis, Samira Mohammed Ali and Dan Richardson was filmed by Tanabi in her native Wales in 2014 and will be released in the autumn of 2015. The photographs and video are from the filming.