California woman Erika Padron Lango has been missing since Wednesday, and authorities have impounded her husband’s SUV as they investigate the mother of four’s disappearance.

Lango, 26, took out a restraining order against her husband, Julio Lango, who was arrested for violating the order on Thursday, the Bakersfield Californian reported. Julio Lango is considered a person of interest in his wife’s disappearance.

The Delano Police Department impounded Julio Lango’s SUV on Friday, when Erika’s family called police about concerns over the vehicle.

"The family saw some stains inside the vehicle," Delano Police Sgt. Peter Lopez told the paper. "We don't know what they are. They could be anything."

A lab is testing items found in the SUV, including a dark red sweater and a baseball bat. Results are expected to take a month, according to the Californian.

Police said Erika Padron Lango was last seen by her husband Wednesday night. She left to visit a friend, but she never showed up at the friend’s house and did not show up for work the next day.

A search of the Langos' apartment did not turn up any indications that a struggle or foul play had taken place, the Californian reported.

The couple’s four children are now in protective custody. They were initially placed in the custody of Erika Padron Lango’s mother, when Julio Lango was in jail for violating the restraining order.

Anyone with information on Erika Padron Lango’s whereabouts was urged to call the Delano Police Department at 661-721-3377. The missing woman was described as a 5-foot-4 Hispanic weighing 125 pounds, with brown eyes and straight long brown hair. A tattoo with the word “Julio” is emblazoned on her right shoulder blade.