The NBC-turned-TNT drama cheated death once, but its run came to an abrupt end with the Season 5 finale, which concluded with officer John Cooper being shot by the police after he brutally assaulted his neighbor.

Sure, EP Jonathan Lisco suggested to TVLine that John could have survived, but we would prefer for it to be official canon.

https://tvline.com/lists/cancelled-tv-shows-cliffhangers-series-finales-endings-hannibal-agent-carter/southland-cancelled-ending/