Mollie Tibbetts, 20, was last seen in the town of Brooklyn, located 50 miles west of Iowa City, according to the Poweshiek County Emergency Management Agency. A neighbor reported seeing Tibbetts going for a jog last Wednesday evening.
TV in Iowa reports the woman was reported missing Thursday morning.
"They are high school sweethearts and been together at least two years", Calderwood said. As her work uniform includes a red shirt, the police are now informing the public that Tibbetts may be wearing jogging clothes such as running tights and a sports bra or her red uniform shirt and denim shorts.
When investigators attempted to search Jack's brother's home, they found Tibbetts's identification and other belongings, but couldn't find Tibbetts's mobile phone. "And then I started getting in contact with her friends and family, saying, "Have you seen her or heard from her?' And they all said the same thing".
Tibbetts' aunt, Kim Calderwood of Brooklyn, told the Des Moines Register that Tibbetts' family is frustrated by the lack of progress in the search.
"We miss you, we're looking for you and we will never stop", Calderwood said.
Officials said they are not ruling out foul play in her disappearance.
Family and friends have also plastered missing posters of the college student in area businesses and have created a Facebook group called Finding Mollie Tibbetts to aid in search efforts. "She's a very responsible and conscientious young woman".
Since Tibbetts vanished, the rural hamlet of Brooklyn, Iowa, with its population of 1,500, has been tirelessly combing streets and farmhouses to "get Mollie back".
"It can be slow and frustrating, but it is our best hope of securing Mollie's location", Emily Heaston wrote. "Helicopter and drone searches do not indicate that any fields in the area have been disturbed or damaged".
"As you know, we have several investigators helping us try to find our girl".
"Tibbetts is 5'2", approximately 120 pounds, with long brown hair and brown eyes. The Poweshiek County Sheriff's Office has said the search for the 20-year-old is ongoing and additional information will be posted to social media accounts.