Complex sentence: D'Angelo unsympathetically reminds Wallace that he knew what the repercussions were for Brandon when he located Brandon the previous night, he tells Wallace the killing is part of "the game" of drug dealing in Baltimore.
Split into simpler sentences: D'Angelo unsympathetically reminds Wallace that he knew what would happen to Brandon after pointing him out the previous night. He also says tells him that killing is part of "the game" of drug dealing in Baltimore.