No one ever calls up 9-1-1 to say they are having a good day.
Think about that. The very nature of the emergent situations wherein law enforcement officers are called include the very worst and most tragic events that happen in our society. These situations are often not only the aftermath of a violent situation, but also frequently involve mortal peril for the responders themselves.
Our entire society is indebted to the folks who wear the uniform and who act for the protection of all of the community. LEOs will probably never tell you the horrors they have seen, or of the sheer heartbreak of senseless destruction they have witnessed. Trust me when I say that you don't want to hear these stories. Simply take for granted that despite the awfulness, that woman or man in uniform put on their belt and their badge the next day, and bravely fulfilled their vow to protect and to serve despite what they'd seen the previous day. We are in their debt.