Complex sentence: Alonzo calms his associates before telling Jake what will happen if he exposes his methods-the LAPD will run a blood test on him, that will identify the PCP-laced cannabis he smoked earlier.
Split into simpler sentences: Alonzo calms his associates before telling Jake what will happen if he exposes his methods. He tells him that the LAPD will run a blood test on him which will identify the PCP-laced cannabis he smoked earlier.