http://www.aetv.com/shows/the-first-48
The First 48 is a documentary television series on A&E. The series offers an insider's look at the real-life world of homicide investigators. While the series follows investigations to their end, it usually focuses on their first 48 hours, thus the title. Each episode picks one or more homicides in different cities, covering each alternately, showing how detectives use forensic evidence, witness interviews and other advanced detective skills to identify suspects