I believe that if you scan a body that was already scanned by a detective with a DNA Scanner it should say in the box that pops up who killed that person.
+1 this just helps with detectives who had their fallen brethren use their almighty overpowered powers to find the killer and have them not die in vain
At this time we will not be looking to do this as being a detective should require you to communicate, and having this would be too easy. Thanks for the suggestion~