true crime serial killer book where killer broke in and raped and murdered his victims and then cleaned their bodies before leaving with dish soap

[Angela]

It is a true crime serial killer book where killer broke in and raped and murdered his victims and then cleaned their bodies before leaving with dish soap. It was told by the serial killer. I read this book back in the late 80's, early 90's when I found it at a 2nd hand book store. Trying to remember what it was called.

[Lobstergirl, au gratin]

Actually written and published by the serial killer? Or an author who was presenting the killer's story secondhand?

[Angela]

An author presenting the story secondhand from the serial killer. Like an interview with the killer and then wrote the book.