Mollie Tibbetts

Case background and investigation

Mollie Cecilia Tibbetts, 20, was a University of Iowa student spending the summer of 2018 in Brooklyn, a small town in Poweshiek County, Iowa. According to an ABC News timeline, she was staying at the home of her boyfriend, Dalton Jack, and looking after his dogs while he was away working in Dubuque. At about 7:30 p.m. on July 18, 2018, she went out for a run wearing running clothes and carrying her phone and a Fitbit. She did not return.

Her family reported her missing on July 19 after she failed to arrive at work. ABC News and CBS News reported that investigators reviewed surveillance video from the town and data from her fitness tracker, followed hundreds of leads, and ruled out a reported sighting in Missouri. A reward fund for her safe return grew to more than $385,000, according to CBS News.

Investigators identified Cristhian Bahena Rivera, then 24, a farm worker from Mexico who was living in the area, after surveillance video showed a black Chevrolet Malibu repeatedly passing through the area where Tibbetts was running, ABC News reported. He was interviewed by police and, in the early hours of August 21, 2018, led officers to a cornfield in rural Poweshiek County, where her body lay covered with corn leaves. According to Wikipedia's summary of the state medical examiner's findings, she died of multiple sharp force injuries. He was charged with first-degree murder and pleaded not guilty.

The trial was moved from Poweshiek County and held in Davenport in May 2021 before Judge Joel Yates, after a delay caused by the COVID-19 pandemic. Prosecutors relied on the surveillance video, on DNA consistent with Tibbetts found in the trunk of the car, and on statements Bahena Rivera made to police, ABC News reported. He testified that two masked, armed men had forced him to take part and that they, not he, killed her. On May 28, 2021, the jury found him guilty of first-degree murder after about seven hours of deliberation, according to NBC News.

Sentencing was postponed while the court considered defence motions for a new trial based on claimed new evidence; the motions were denied. On August 30, 2021, he was sentenced to life imprisonment without the possibility of parole, the mandatory sentence in Iowa. On October 11, 2023, the Iowa Court of Appeals affirmed the conviction, rejecting arguments that his statements to police should have been suppressed and that he was entitled to a new trial.

The case received national attention, in part because of public debate about the defendant's immigration status. News reports at the time noted that members of Tibbetts's family asked that her death not be used for political purposes.