August Vollmer’s early 20th century police reform led to some technological innovations that included which of the following?DNA testingFist use of scientific investigations that involved the analysis of blood, fibers, and soilElectronic crime mappingThe devising of criminal history databases

August Vollmer's early 20th-century police reform led to several technological innovations. These included:

1. First use of scientific investigations that involved the analysis of blood, fibers, and soil: Vollmer was a pioneer in the field of forensic science. He believed in the importance of using scientific methods in police work and was instrumental in introducing techniques such as blood, fiber, and soil analysis in criminal investigations.

2. Electronic crime mapping: Vollmer was also a proponent of using technology to aid in police work. He introduced the concept of electronic crime mapping, which is a tool that helps law enforcement agencies to visualize and analyze crime patterns.

3. The devising of criminal history databases: Another significant contribution of Vollmer was the creation of criminal history databases. These databases allowed for the efficient storage and retrieval of criminal records, which greatly aided in the investigation process.

However, DNA testing was not one of the technological innovations that resulted from August Vollmer's police reform. The technology for DNA testing was not developed until many years after Vollmer's time.