Jimmy Hernandez

Events
Hernandez almost blows his membership with Tenpenny and Pulaski early on, after he says that a domestic dispute was difficult. Tenpenny tells him to get out of the car in East Los Santos, however he is later seen in the dock area with Tenpenny and Pulaski. In The Introduction, Tenpenny asks Hernandez to shoot Ralph Pendelbury, which he does only after having his own life threatened.

Hernandez continues to work with Tenpenny and Pulaski in controlling each of the four gangs in Los Santos, but also in controlling the returning Carl Johnson. They pull him over when he is just around the corner from his home in Ganton, and frame him for the murder of Officer Pendelbury. They throw him out of the car, and leave him in Jefferson, which is Ballas territory. Later on, Hernandez phones Carl Johnson, telling him not to leave Los Santos and that they are watching him.

C.R.A.S.H. then tells Ryder about a train load of ammunition and weapons arriving in Los Santos, which Carl and Ryder then take. C.R.A.S.H. later employs Carl Johnson to burn down a number of houses used by the Los Santos Vagos. Following this, Carl is told to disrupt a meeting between the Ballas and the Russian Mafia. However, C.R.A.S.H. later turn on Carl and the Grove Street Families, and take Carl to Angel Pine in Whetstone.

Carl is left without any weapons and in the middle of nowhere, however C.R.A.S.H. knows exactly where he is. They send him up Mount Chiliad to kill a witness who is going to testify against Tenpenny and Pulaski, possibly Hernandez as well.

Upon reaching Las Venturas, Carl Johnson finds out from Mike Toreno about the murder of Officer Ralph Pendelbury by the hands of Frank Tenpenny, although Frank only ordered the murder, while Hernandez actually killed Pendelbury. This might be explained by the fact that Hernandez reported the murder to Internal Affairs, but told them that Tenpenny killed Pendelbury, since  admitting he murdered an officer could bring him trouble. Since Toreno is a governmental agent and has access to such information as Jimmy's statement, he told Carl only what Hernandez declared. Of course, nobody could know what actually happened, with Pendelbury dead, Hernandez protecting himself, C.R.A.S.H. framing CJ and CJ not knowing the real situation. Toreno himself does not mention Hernandez.

When Carl, Tenpenny and Pulaski next meet in Las Venturas, Frank Tenpenny says that the gig is nearly up. He states that he and Pulaski may lose their badges, but does not mention Hernandez. This suggests that they are aware of Hernandez's role within C.R.A.S.H. This becomes apparent when Tenpenny and Pulaski turn onHernandez. Tenpenny hits him with a shovel, and presumes he is dead and leaves. Pulaski, meanwhile, is left to kill Carl Johnson, but Hernandez suddenly gets up in order to help Carl. However, Pulaski turns round and shoots Hernandez in the heart, killing him, with his body falling into the grave.

He is mentioned in the mission Riot by a television news reporter, saying that he had probably been killed for threatening to turn states evidence.

Personality
Hernandez is actually a good cop, as he clearly wants to stop gang violence, not manipulate it like Tenpenny and Pulaski. In The Introduction, he mentions a domestic dispute over a father beating his drug-addicted spouse for buying drugs instead of food, thus allowing their children to starve. He recalls asking himself if he should let the man off for domestic abuse, which would teach the wife a lesson, or arrest the man, which would leave the children with a drug-addict of a mother. While telling this story, he is ignored by Tenpenny and Pulaski.

Hernandez seems to have respect for Tenpenny at the beginning of The Introduction, but after being forced to kill fellow officer Ralph Pendelbury and seeing Tenpenny and Pulaski dealing with CJ, whom he knows is a criminal, he decides to inform the feds on his co-workers.