“Chi-Raq” represents a return to form for co-writer/director Spike Lee. The last decade has been tough for the once mighty helmer, with recent releases (“Da Sweet Blood of Jesus,” “Red Hook Summer”) forgotten soon after their initial release, while his last studio effort, the wretched “Oldboy,” almost killed his career. “Chi-Raq” revives Lee’s distinctive interests in social commentary and satire, taking on gun and thug culture with a blistering overview of Chicago as it slowly succumbs to brutality. Submitting his finest work since the 1990s, Lee is inspired and alert for a change, displaying renewed interest in the world around him. The mischief and outrage presented here is outstanding. Read the rest at Blu-ray.com