 He is very insistent on gun maintenance, especially since team member Tim Speedle was killed in a shootout after his gun misfired because of his lax maintenance.In fact, one of the reasons for Horatio's nearly on-the-spot selection of Officer Ryan Wolfe as Tim Speedle's replacement (in episode 303, "Under the Influence") is Wolfe's compulsive care of his firearm due to OCD.He is later forced to fire Wolfe, as the younger CSI compromised himself during the course of the investigation due to his gambling debts and lack of honesty regarding the situation (episode 522, "Burned").