How has criminal profiling advanced from the early days of Jack the Ripper to modern-day profiling?

How has criminal profiling advanced from the early days of Jack the Ripper to modern-day profiling? Please provide examples, especially when it comes to scientific advances. 12 Arial font, double-spaced. APA format will be used on all papers. APA formatting within the paper, as well as the bibliography, Be sure to include a bibliography.