Mom of missing pregnant woman doesn't suspect son-in-law

TWENTYNINE PALMS, Calif. - The mother of a missing pregnant woman in Southern California says she does not suspect her son-in-law in her daughter's disappearance, reports CBS Los Angeles.

Erin Corwin, 19, was last seen at her home just before heading to Joshua Tree National Park on June 28 around 7 a.m., according to the station. She is three months pregnant.

Corwin's husband, Marine Cpl. Jonathan Wayne Corwin, reported her missing the following morning, the station reports. He is based at the Twentynine Palms Marine base, near where Erin's 2013 Toyota Corolla was found.

Lore Heavilin, Erin's mother, said she does not believe her son-in-law could be linked to any possible foul play, according to CBS Los Angeles. Police have called the disappearance "suspicious."

The station reports there has been no phone, bank or social media activity on any of the missing woman's accounts. Homicide detectives have taken the lead role in investigating, though the disappearance is still considered a missing persons case.

A search for Erin Corwin has been conducted by air and land but has so far produced no results. Officials told CBS Los Angeles Jonathan Corwin has been cooperative.