Missing Iowa jogger Mollie Tibbetts was doing homework late on the night she disappeared

As police try to retrace the steps of an Iowa college student who disappeared earlier this month, new information suggests she was doing homework late on the night she vanished.

Mollie Tibbetts, 20, disappeared after going for a jog near her boyfriend’s home in Brooklyn, Iowa, on July 18. She was dogsitting for her boyfriend who was out of town for a construction job at the time. 

It’s unclear if she returned home after the jog but new information shows Tibbetts’ boyfriend, Dalton Jack, received a Snapchat from her around 10 p.m., which appeared to be taken inside. 

Photos from the case: 

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Missing Iowa student Mollie Tibbetts found dead
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Missing Iowa student Mollie Tibbetts found dead
A ribbon for missing University of Iowa student Mollie Tibbetts hangs on a light post, Tuesday, Aug. 21, 2018, in Brooklyn, Iowa. Tibbetts was reported missing from her hometown in the eastern Iowa city of Brooklyn in July 2018. (AP Photo/Charlie Neibergall)
This undated photo provided by the Iowa Department of Public Safety shows Cristhian Bahena Rivera. Authorities said on Tuesday, Aug. 21, 2018, that they have charged a man living in the U.S. illegally with murder in the death of Iowa college student, Mollie Tibbetts, who disappeared a month ago while jogging in a rural area. Iowa Division of Criminal Investigation Special Agent Rick Rahn said that Rivera, 24, was charged with murder in the death of Tibbetts. (Iowa Department of Public Safety via AP)
A county truck blocks a gravel road, Tuesday, Aug. 21, 2018, near Brooklyn, Iowa. Police say a body believed to be that of 20-year-old college student Mollie Tibbetts has been discovered in a rural area near where she went missing last month. University of Iowa student Mollie Tibbetts was reported missing from her hometown in the eastern Iowa city of Brooklyn in July 2018. (AP Photo/Charlie Neibergall)
People in the courtroom reacts after Cristhian Bahena Rivera's initial court appearance, Wednesday, Aug. 22, 2018, at the Poweshiek County Courthouse in Montezuma, Iowa. Rivera is charged with first-degree murder in the death of Mollie Tibbetts, who disappeared July 18 from Brooklyn, Iowa. (Jim Slosiarek/The Gazette via AP, Pool)
(Photo via Facebook)
Cristhian Bahena Rivera speaks with his attorney during his initial court appearance, Wednesday, Aug. 22, 2018, at the Poweshiek County Courthouse in Montezuma, Iowa. Rivera is charged with first-degree murder in the death of Mollie Tibbetts, who disappeared July 18 from Brooklyn, Iowa. (Jim Slosiarek/The Gazette via AP, Pool)
(Photo via Instagram)
A poster for missing University of Iowa student Mollie Tibbetts hangs in the window of a local business, Tuesday, Aug. 21, 2018, in Brooklyn, Iowa. Tibbetts was reported missing from her hometown in the eastern Iowa city of Brooklyn in July 2018. (AP Photo/Charlie Neibergall)
My first experience as a best man went well🎉
Cristhian Bahena Rivera is escorted into the Poweshiek County Courthouse for his initial court appearance, Wednesday, Aug. 22, 2018, in Montezuma, Iowa. Rivera is charged with first-degree murder in the death of Mollie Tibbetts, who disappeared July 18 from Brooklyn, Iowa. (AP Photo/Charlie Neibergall)
You guys really thought I was gonna let a birthday pass without a selfie?😎 (posting a day after but I took it on my birthday so whatever)
Just a Hawkeye with her hot guy 💛🖤
A poster for missing University of Iowa student Mollie Tibbetts hangs on the front door of a local business, Tuesday, Aug. 21, 2018, in Brooklyn, Iowa. Police say a body believed to be that of 20-year-old college student Mollie Tibbetts has been discovered in a rural area near where she went missing last month.Tibbetts was reported missing from her hometown in the eastern Iowa city of Brooklyn in July 2018. (AP Photo/Charlie Neibergall)
Happiest of birthdays to the person who made track bearable. Of all of the laps we ran together, the last one was the hardest (even if we made it the slowest) because we were ending quite an era😉 You are such a happy, hardworking, and genuine person, and I'm so lucky I get to call you my friend. Happy birthday my dude 😘😊
A ribbon for missing University of Iowa student Mollie Tibbetts hangs on a light post, Tuesday, Aug. 21, 2018, in Brooklyn, Iowa. Police say a body believed to be that of 20-year-old college student Mollie Tibbetts has been discovered in a rural area near where she went missing last month. Tibbetts was reported missing from her hometown in the eastern Iowa city of Brooklyn in July 2018. (AP Photo/Charlie Neibergall)
Cristhian Bahena Rivera is escorted into the Poweshiek County Courthouse for his initial court appearance, Wednesday, Aug. 22, 2018, in Montezuma, Iowa. Rivera is charged with first-degree murder in the death of Mollie Tibbetts, who disappeared July 18 from Brooklyn, Iowa. (AP Photo/Charlie Neibergall)
Currently wishing I was exploring water falls with best friend instead of sitting in an airport
A poster for missing University of Iowa student Mollie Tibbetts hangs in the window of a local business, Tuesday, Aug. 21, 2018, in Brooklyn, Iowa. Tibbetts was reported missing from her hometown in the eastern Iowa city of Brooklyn in July 2018. (AP Photo/Charlie Neibergall)
I can't think of a caption but New York is cool
A poster for missing University of Iowa student Mollie Tibbetts hangs in the window of a local business, Tuesday, Aug. 21, 2018, in Brooklyn, Iowa. Tibbetts was reported missing from her hometown in the eastern Iowa city of Brooklyn in July 2018. (AP Photo/Charlie Neibergall)
Cristhian Bahena Rivera is lead into the courtroom for his initial court appearance, Wednesday, Aug. 22, 2018, at the Poweshiek County Courthouse in Montezuma, Iowa. Rivera is charged with first-degree murder in the death of Mollie Tibbetts, who disappeared July 18 from Brooklyn, Iowa. (Jim Slosiarek/The Gazette via AP, Pool)
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Family members said Tibbetts is a creature of habit and usually runs each day, taking one of three routes in the area.

"I read somewhere that she was running in a cornfield. That's obviously not true," Kim Calderwood, her aunt, told ABC News. "The run happened and then she was at the house as far as we know. I don't think she would've run in the dark."

The next day, Tibbetts didn’t show up for work.

Authorities have yet to give an official timeline; however, police have been combing through information from Tibbetts’ Fitbit, which she always wore, as well as her cellphone and social media accounts. 

“We are getting a lot of information back from that process. We are very hopeful with the electronic data we are getting back,” Mitch Mortvedt, assistant director of the Iowa Division of Criminal Investigation, previously told the Des Moines Register. “We are relying on the FBI heavily because it’s an ever-changing world in technology."

Crime Stoppers is now offering $1,000 for any information in the 20-year-old's disappearance.

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