What are two major contributions to forensic science from Hans gross?

Hans Gross is often regarded as the father of criminalistics, and two of his major contributions to forensic science include the establishment of a systematic approach to crime scene investigation and the introduction of the concept of using interdisciplinary methods in forensic analysis. In his seminal work, "Handbuch für Untersuchungsrichter, Polizeibeamte, Kriminalbeamte," Gross emphasized the importance of applying scientific methods and disciplines, such as psychology and Biology, to criminal investigations. His work laid the groundwork for modern forensic science practices and the integration of various scientific techniques in solving crimes.