There will be as many responses as there are individual personalities. 

Police officers are very task oriented and strive to be objective. While at a crime scene they keep focussed on their responsibilities and the tasks they must accomplish. They keep their emotions in check as a way of protecting themselves from the emotional trauma of being present and seeing what has happened. You might not understand this professionalism. Over the duration of the investigation you might want to seek out officers with whom you feel comfortable.

It is important to remember that many police officers have also been impacted by homicide. Some have experienced the murder of a father or a sister, just as you have, and have journeyed along a similar road to you.

Mennonite Central Committee Canada. (2011). Getting through the maze: A guidebook for survivors of homicide.