https://www.looper.com/1549962/joe-reagan-blue-bloods-what-happened/

The late Joe Reagan is mentioned frequently on "Blue Bloods." How did he die, and why is he so important to the show's narrative years after his passing?

I wonder if Officer McFadden will be shown again and if he is, will he go by his real last name then with him being the song of the man who killed Joe.

God bless you always!!!

Holly