Revisiting PI Sam's Favorites

I had reason to go back over PI Sam's favorites yesterday.
http://supersonicpi.blogspot.com/2013/04/we-asked-and-pi-sam-answered-part-1.html
http://supersonicpi.blogspot.com/2013/04/we-asked-and-pi-sam-answered-part-2.html
I was reading an article about Sue Grafton who is the author of the books featuring Sam's favorite fictional PI,  Kinsey Mahone.  I still need to start reading this series.  I also started thinking that I should do my favorites, but since I am more CJ (Criminal Justice) than PI my list will be police/law enforcement.  I am going to start working on that tomorrow,I have a feeling once I sit down to write it, it won't be so easy to come up with only one fave.  Maybe I'll do my top three.