Gene message

"Gene Message," presented to him with an introduction including: "In this book, I will discuss the evolution of biology since the discovery of DNA by the ambitious Swiss youth Friedrich Mischer, passing through Levin's research on sugars and the discovery of Chargaff's rule regarding nitrogenous base pairing, then the discovery of the principle of biological transformation by Oswald Avery, and the subsequent revolutionary discoveries by Watson, Crick, and Rosalind Franklin about understanding the structure of DNA and reading the genetic code, up to the latest tools of genetic modification. The story of the murdered girl was the main reason behind the birth of this book, so I will choose a pseudonym for the girl, a name consisting of four letters (Sarah). How was she killed? Who killed her? And what is the role of DNA technology in knowing the details of the incident and uncovering her legacy?"