The sister of a missing Vegas showgirl has told RadarOnline.com she is starting to believe her sister met with foul play. 

Deborah Flores-Narvaez went missing over a week ago from her Vegas home, as we previously reported.

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In an exclusive interview, the former Washington Redskins’ cheerleader’s sister Celeste declared: “Someone else was involved in this.” 

Police found Deborah’s car last Thursday in what is described as an abandoned run down neighborhood.

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Celeste told RadarOnline.com news of the car is making her less hopeful, but she added “I have to make myself believe she is coming home.”

It sounds like a case for CSI, the crime show set in Las Vegas.  Beautiful showgirl Deborah Flores-Narvaez has been missing for a week, RadarOnline.com has confirmed.

PHOTOS:  Celebs Involved With Murder

The popular dancer who appears in the adult show Fantasy at the Luxor and is a go-go dancer at Rain nightclub at the Palms Hotel, was last seen December 12 when she went to visit her former boyfriend Blu Griffin.

The former Washington Redskins cheerleader hasn't been seen since, although her car was recovered the next day.

"Dancing cheered her up, plain and simple," her sister Celeste Flores-Narvaez, who flew in from Atlanta to help with the search, told reporters.  "It made her happy."