Suzanne Simpson Update: James Cotter, former associate of Brad Simpson, has been arrested as the search continues for a missing woman in Olmos Park

OLMOS PARK, Texas – Police have arrested another person as the search continues for a missing Texas mother near San Antonio.

It has been over two weeks since Texas mother of four Suzanne Simpson was reported missing in Olmos Park, Texas.

Now the police have arrested her husband's former business partner Brad Simpson.

James Cotter is accused of helping Brad Simpson hide a gun that may be linked to his wife's disappearance.

A neighbor reportedly witnessed an argument between the Simpsons before Suzanne went missing.

SEE MORE: Husband Arrested in Connection with Missing Texas Woman Suzanne Simpson; The rumor mill is working overtime

Brad Simpson is currently behind bars for this incident and is facing charges of assault and unlawful restraint.

“This is all a strategy for a murder investigation or what they think is a murder investigation. And so they use that strategy to keep him in jail for 30 days,” said Robert Boyce, a former NYPD detective.

Police say Brad Simpson was uncooperative.

Last week, investigators expanded their search for Suzanne Simpson to a landfill, but found no trace of her.

Cotter is charged with one felony count, including “tampering with evidence.”

As for Simpson, his lawyer calls the allegations against him “ridiculous.”