Throughout his teenage years, Warrick worked as a casino runner: someone who jots down sports bets and runs between casinos to place those bets.
He put himself through college working as a taxi driver, a bell captain at the Sahara, selling helicopter rides over the Grand Canyon, and a grave digger before finding his way to the Las Vegas Metropolitan Police Department and its CSI.
Finally, he gets Grissom and Brass involved and has the judge arrested after wearing a wire.
To let off steam, Warrick DJs at clubs run by his friends and writes his own songs.
Spending his whole life in the city means that Warrick knows at least one person in most bars, clubs, and hotels there.
Mc Keen said "You never give up, that's what makes you a great CSI." As Warrick was about to drive away, Mc Keen shoots Warrick in the neck and the chest.
In the Season 9 premiere, Grissom discovered Warrick's body in his parked car.
Nearing the Season 6 finale, Warrick's marriage seemed to have become rocky, but after a scene when Tina's supposed infidelity was shown to be her planning a party for Warrick, nothing more of the marriage has been shown.
Through the mid-point of Season 7, Warrick still wears his wedding band, but towards the end of season Seven he makes a comment that suggests they are divorced.
Warrick was the only member of the team born and raised in Las Vegas. He loved the casinos, the action and the pulse of the city.
Until the day he died, Warrick never met his father.
Grissom removed him from the car and discovered that Warrick was still alive.
Warrick attempted to tell Grissom of his attacker, but was deterred by Mc Keen's brandishing of a gun out of view of the unsuspecting Grissom, dying moments afterward in his arms. During the investigation of his death, papers were found in Warrick's apartment by Greg Sanders, disclosing that he had a son.
Warrick pushed the team as hard as he could when investigating Nick's disappearance, not knowing what he would do if he was unable to save his friend.