This is a man who tried to scalp and gouge out the eyes of his social worker, raped and assaulted his mother, and said that he loved the sound of women screaming in pain.
I am convinced that BK is a serial killer in the making. A significant proportion of serial killers enjoyed dressing up as women because they regarded being 'female' as being subservient and worthy of abuse (prominent trans thinker and author Andrea Chu also thinks this): e.g. Ed Gein, Ed Kemper, Peter Sutcliffe, Hadden Clark, Chales Manson, Henry Lee Lucas, Doil Lane are just a few of the serial killers who also were trans women.
There needs to be urgent research on the causative or correlative links between AGP trans and violence against women. BK would be a great living case study.
And yes the fact that he spent a year in a women's prison should be a focus of global media excoriation.