Texas investigators on Thursday ended their four-day search for a missing realtor and mother of four in a Bexar County landfill.

The Texas Department of Public Safety said it found no evidence of Suzanne Clark Simpson, who has been missing since October 6, KSAT reported.

“On Monday October 10th information gathered during the investigation led law enforcement officers to conduct a search for Simpson at the landfill site located east of San Antonio,” Texas DPS Sgt. Deon Cockrell said in a statement. “After conducting an extensive search consisting of digging and sifting through the municipal solid waste, no evidence was found.”

As CrimeOnline previously reported, investigators did not say what information led them to search the landfill.

Clark Simpson was last seen by a neighbor outside her Olmos Park home arguing with her husband between 10 and 11 p.m. on October 6. The neighbor reported hearing screams and later saw Brad Simpson drive away from the home and return about an hour later.

Simpson has been been arrested and charged with assault causing bodily injury-family violence and unlawful restraint. He is also facing a federal gun charge for possessing an unregistered short-barreled rifle.

He is currently being held on a $2 million bond. Federal agencies have placed a hold on him because of the gun charge in the event that he makes bond.

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[Featured image: Suzanne Clark Simpson/KSAT screenshots]