As the world ages, our technology grows stronger. When it comes to criminal cases such as murders, the development of technology can always be in favor of investigators. With the Grim Sleeper case in Los Angeles, DNA technology has become a wonderful tool for investigators. In the United States, the first appellate court decision to admit DNA evidence was made in Florida in 1998, over the next few years DNA evidence gradually became a regular feature of criminal cases (Lewis 2010). Having the technology we have today, we can connect recent cases with unsolved cases. A technological breakthrough in this case was the unique familial DNA test. This happened when the "Grim Sleeper" returned. With the only survivor in 1988, a bullet arrived for comparison, with the use of ballistics. Ballistics helps match bullets and firearms. Ballistic tests had compared the bullets extracted from the survivor with those taken from previous victims. In the mid-1980s they matched several bullets to previous crimes. The Los Angeles police had also distributed thousands of flyers with information about the murder...