Nearly three weeks ago, authorities announced an arrest in the brutal killing of Mercedes Vega, an exotic dancer who was found dead 19 months ago in a burning car on an Arizona highway. Mercedes Vega with her mom, Erika. A spokesperson for the Maricopa County Sheriff's Office said he understood the many questions about the case that remain, but he declined to comment further because of the ongoing investigation. A spokesperson for the Maricopa County Prosecutor’s Office also cited the case's status and declined to comment. Security footage of Mercedes Vega.

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Persons: Mercedes Vega, Erika Pillsbury, —, Sencere Hayes, Hayes, Vega, Erika, Russ Skinner, Mercedes ’, Pillsbury Organizations: Maricopa County Sheriff's, Maricopa County Prosecutor’s, Authorities, Dateline, NBC, Farm Insurance Locations: Arizona, Chattanooga , Tennessee, Maricopa, Maricopa County, Tempe, Phoenix, Malibu, Tonopah