They are oftentimes given more information, especially throughout the course of an investigation than what we would typically have at the scene. They are initially outside interviewing witnesses and other people, be it even a suspect and/or victim.
At times what they will do because I'm given basic information when I show up to the scene, I'm typically not privy to the ongoing active investigation.
So other detectives, be it homicide detectives or anybody else would come into the scene and go hey, we just found out this. Can you look for this.
And then I may have a piece of evidence that I already collected that I deemed important to the case, or I assumed it might have something to do with it, and I would think to send it to the DNA lab.
Well, they may find out something and say can you go ahead and send that to firearms first before it goes to DNA, can you send this to fingerprints before going to DNA or vice versa.
So they come in and ask certain things or ask that things be sent or certain things be collected that I may not have known about initially.