In his first appearance, he aids CSI Sara Sidle in discovering who executed a young student. Like his stepfather, Detective Vega, he has good knowledge of local gangs within Las Vegas and immediately discovers that the murder was gang related and that it linked to the other cases in Coup de Grace.
Season Twelve
Altered Stakes
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Homecoming
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Season Thirteen
Karma to Burn
He helps find the location of Finlay and Kaitlyn Russell when they are kidnapped by McKeen's men. When corrupt detective Michael Crenshaw is about to murder Finlay, Moreno bursts in a shoots him.
Wild Flowers
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Notes
In Coup de Grace, he says his mother liked 9mm guns. The implication is uncertain, but may suggest that she is dead somehow.