“Shaft” (**1/2 out of four) was a moderately entertaining sequel about John Shaft, Jr. (Jessie T. Usher) who has grown up to be a cyber-security analyst at the FBI. When one of his friends dies, he enlists the help of his cop father (Samuel L. Jackson) who in turn turns to his father Shaft, Sr. (Richard Roundtree) to uncover the truth and clean up the streets. It’s always fun to watch Jackson in his badass routine and him, Usher, and Roundtree all have good chemistry together but there’s a fundamental emptiness to the script and story and you wish the villains had been stronger and better defined. Regina Hall has a few laughs as Usher’s mom.