The Head of the Miami-Dade crime lab, a forensic analyst and former bomb squad officer. In season 1 episode 2, Caine revealed that everything he knew had been taught to him by his mentor, Al Humphreys (played by Lou Beatty, Jr.), who is killed by an explosion while trying to defuse a bomb in the episode. Caine was briefly married to Eric Delko's sister Marisol, which ended when she was murdered by a Mala Noche sniper. As of the season 6 premiere, Horatio has discovered that he has a 16 year old son named Kyle. Kyle was tried as an adult for kidnapping and put in jail. He was present at the death of Tim Speedle, and his brother, Ray (thought dead), and nephew, Ray Junior, are commonly referenced. Caine appears to have a good sense for how to communicate with children who have just experienced traumatic ordeals, obtaining information from them quickly and gently.

(wikipedia.org)