erience assisting in missing-person searches across North Texas, said the lack of information about where to look has made the search particularly challenging.

 We don't know where they are. We don't know what happened. It's the not knowing that's hard,  Solis told Telemundo 39.

Solis is asking anyone who may have bought, sold or traded a vehicle with Richard Pastor Perez to contact Denton police, saying information about what kind of vehicle Perez was driving could provide a starting point for the search.

 If you did business with this man, if he bought and sold or traded vehicles with you, please reach out to Denton PD,  Solis said.

Denton police and the FBI are scheduled to provide an update on the investigation at 2 p.m. Tuesday.