Luis is the second eldest of five children. A superstar in high-school (captain of the football, baseball, and basketball team, class president and valedictorian, and a major ladies man), Luis had dreams of being a lawyer, but his father's disappearance when he was a young child meant he had to stay home, get a job, and support his mother and siblings. He even broke off his relationship with Beth Wallace, his high-school sweetheart and his first love, because he was afraid he would leave her like his father left his mother.

He first met Sheridan Crane when she crashed into his police car (twice!), and sparks continued to fly when it turned out that her community service was to be played out at the community center where he was youth director. They had a couple of uneventful dates, but nothing really came of it, and she started dating his best friend, Hank Bennett, with Luis' blessing. Luis began dating Beth again briefly, but was too into Sheridan to be as into rekindling their old love as Beth was. She slowly faded out of the picture.

Sheridan and Luis continued to dance around each other until Luis was assigned by the FBI to be Sheridan's bodyguard. They kept getting closer and closer, until they finally admitted their feelings to each other. Unfortunately, Sheridan was shot shortly after. Devastated by her death, Luis was inconsolable...until it turned out she was actually alive. After recovering in the hospital, Luis and Sheridan reaffirmed their love for each other, and Luis gave his blessing to Theresa and Ethan's engagement.

After a LOT of false starts, they finally managed to make love shortly after Ethan was revealed to be Sam Bennett's son. They're making tentative plans for the future...starting with their engagement! Unfortunately, the double-wedding didn't go off as planned...and now, Sheridan is presumed dead!