Complex sentence: Grutter meanwhile has seen Mado and her injuries, and she breaks off with him; inferring that Tony is at the root of Mado's decision, he gives his heroin-addicted brother drugs and tells him to murder Tony.
Split into simpler sentences: Grutter meanwhile has seen Mado and her injuries, and she breaks off with him. Inferring that Tony is at the root of Mado's decision, he gives his heroin-addicted brother drugs and tells him to murder Tony.