Convinced Carl killed his mother, Scott fatally shoots him. Scott is certain that Carl killed his mother, but the real culprit proves to be a painter who took Fanny's friendliness as flirting and assaulted her. Natalia assures Fanny's son, Scott, that the killer will be brought to justice.

Fanny Silver lies dead in her house, and suspicion falls on her husband, Carl. Yelina uses a GPS tracker on Ray Jr.'s watch to locate the boy, but he's with Riaz and the drug lord spirits him away before Horatio can stop him.īack in Miami, Ryan reluctantly accompanies new CSI-and former mole-Natalia Boa Vista on a case. Horatio stands by helplessly as his brother passes away, and he vows to protect his nephew. It's too late for Ray-he's found beaten and barely alive. Calleigh is at charge back in the lab, and she and Dan Cooper identify a substance on Ray's shoe that leads Horatio and Delko into a rainforest in the heart of Rio. His fears are confirmed, and worse, he learns his nephew, Ray Jr., might also be involved. Horatio pays a visit to Yelina Salas, his brother Ray's wife, fearing that Ray is embroiled with the drug lord. Riaz haughtily taunts Horatio as he's released by Brazilian authorities who aren't convinced by the Miami DA's case against him. Horatio Caine and Eric Delko arrive in Rio de Janeiro with revenge on their mind, intent on hunting down Antonio Riaz, the killer of Horatio's wife and Eric's sister, Marisol. Back in Miami, Natalia, now a CSI, helps Ryan investigate the beating death of a woman in Coral Gables. While there, Horatio meets Yelina and learns that his brother is back doing undercover work and may be connected to Riaz, for whom Horatio also suspects his nephew is working. Horatio and Delko travel to Rio de Janeiro to find Riaz, the man responsible for Marisol's murder.

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