The husband of a missing Oregon mother is pleading with the public to search roadsides for any sign of his wife, saying, "I have a feeling maybe she's in a ditch somewhere."
Jennifer Huston, a 38-year-old mother of two, was captured on surveillance video five days ago purchasing gas at the Circle K gas station in Newburg -- a 9-minute drive from her home. Her husband, Kallen Huston, said Jennifer told him she was running errands after he had returned home from work on Thursday, and had also complained about a headache.
Huston has not been seen since security footage showed her using her debit card to buy gas for her 1999 dark green Lexus LX 470. Prior to visiting the gas station, Huston withdrew a "small sum" of cash at an ATM, Cpt. Jeff Kosmicki of the Newberg-Dundee Police Department told FoxNews.com.
Investigators on Monday held a press conference with Huston's family during which Kallen Huston begged the public to search alongside roads for any signs of his wife and her vehicle.
"I have a feeling maybe she's in a ditch somewhere," he said. "We've exercised every option that we can think of right now."
"For anybody to have a headache for three days – it's not normal," he said. "It certainly wasn’t normal for her."
Bill Turner, Jennifer Huston's father and a former homicide investigator, told FoxNews.com that he is helping police piece together the final moments before his daughter vanished, and described his son-in-law as "solid as a rock."
Turner said authorities are poring over security footage taken from from several businesses along a Portland, Ore., highway for any clues into Huston's disappearance.
"A number of businesses up and down the highway have video that captures what happens on the road," Turner said. "They're looking for directional information."
The gas station security footage shows Huston, a stay-at-home mom, purchasing gas between 6:10 and 6:22 p.m. on Thursday. Turner said he reviewed the footage with police and that it did not show anyone inside the vehicle with his daughter.
"There was nobody in the passenger's seat," Turner said. "Went through all the different camera angles and there was also no movement in the backseat."
Kosmicki confirmed that no one is seen inside the vehicle with Jennifer but noted the footage "is not the best quality."
"She just handed her debit card over and the attendant pumped the gas for her," Kosmicki said of Huston, who has two sons, ages 3 and 6.
The debit purchase at Circle K gas station was the only one made on Thursday, according to her father, who said he reviewed her bank records.
"This is not like her," he said. "She’s a highly devoted mom to her boys."
Kosmicki said that about 20 to 25 minutes after Huston left the gas station her cell phone "stopped sending any information to the cell tower."
"I don't know if the phone was turned off or if it ran out of battery," he said.
Kosmicki also said surveillance video taken from a nearby bank showed Jennifer withdrawing cash from an ATM just before 6 p.m. Thursday.
"It's a much better video. You can clearly see her facial details," he said. "Based on her actions, she seemed pretty calm." He said the video showed her opening the door slightly to finish her transaction.
Kallen Huston has called his wife's disappearance "completely out of character."
Turner, who once worked with the U.S. Army's Criminal Investigation Command investigating murders and suicides, described his son-in-law as "solid as a rock."
"He and Jennifer met through mutual friends. The best description I have of their relationship is two old souls," Turner told FoxNews.com. "Kallen is the most incredibly patient person I know. They get along. There's no discord in the home whatsoever.
No activity has been recorded on Huston's bank cards, according to police. Authorities said an aerial search conducted Sunday in Yamhill County turned up no trace of this young mother. Kosmicki noted that Huston's vehicle did not have a tracking device.
A Facebook page set up in the search for Huston says she was last seen wearing black and pink Nike shoes and black yoga pants. Her vehicle, a 1999 Lexus LX 470, has an Oregon license plate of WXH 011.
Anyone with information is urged to call the Newberg-Dundee Police Department at 503-538-8321.
Cristina Corbin is a Fox News reporter based in New York. Follow her on Twitter @CristinaCorbin.