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: 

8 PHOTOS
Missing Iowa student Mollie Tibbetts
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Missing Iowa student Mollie Tibbetts
My first experience as a best man went well🎉
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 💛🖤
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 😘😊
Currently wishing I was exploring water falls with best friend instead of sitting in an airport
I can't think of a caption but New York is cool
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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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