“Triple 9” (**1/2 out of four) was an engrossing underworld thriller about a gang of criminals and corrupt cops (Anthony Mackie, Casey Affleck, and Woody Harrelson) who plan the murder of another cop but all is not what it seems and everyone has a different agenda. Often hard to follow but so emotionally charged and fast-paced and full of robust performances that it’s hard not to get caught up and involved in. Sizzling and sleazy material in the vein of “To Live And Die In L.A.” and “L.A. Confidential” is not in the same leagues but still worth checking out. Mackie and Affleck, in particular, sear the screen.