The Chevy Malibu that investigators linked to Cristhian Rivera, the Mexican immigrant accused of murdering 20-year-old University of Iowa student Mollie Tibbetts, was not registered in Rivera's name, Fox News reported, citing a law enforcement source on Wednesday.
On Tuesday, police said that the Malibu, which was caught on surveillance footage in Brooklyn, Iowa, was driving back and forth in the area where Tibbetts was jogging in the "late afternoon hours of July 18," the day she went missing.
He said he "got mad" when she threatened to call 911, but claimed to have no memory of her death.
When his memory purportedly returned, Rivera noticed a headphone earpiece in his lap, which is "how he realized he put her in the trunk."
According to officials, Rivera checked the trunk of his car, where he saw Tibbetts' body wearing exercise clothing and with blood on both sides of her head.
He said he dragged her into a secluded corn field, and allegedly left her body face-up and covered with corn stalks.
The confession came just hours after Mollie Tibbetts’ body was found dumped in a cornfield earlier this week, following a month-long disappearance.
The gruesome killing has induced widespread horror and prompted an elevated level of attention and outrage from conservative politicians, including President Donald Trump who blamed US immigration laws for Tibbetts' death.
“You heard about today with the illegal alien coming in, very sadly, from Mexico and you saw what happened to that incredible, beautiful young woman,” Trump told the crowd at a rally in West Virginia on Tuesday evening.
“Should’ve never happened. The laws are so bad, the immigration laws are such a disgrace. We’re getting it changed, but we have to get more Republicans,” he added.
Cristhian Rivera apparently had been working on a farm in the area and was vetted by the government system.
On Wednesday, a judge in Montezuma, Iowa, ordered him to be jailed on a $5 million, cash-only bond.
A conviction on a first-degree murder charge carries a mandatory sentence of life in prison without parole in Iowa, which doesn’t have the death penalty.
Iowa’s governor Kim Reynolds and the state’s two US senators issued statements insisting that more must be done to stem the tide of illegal migrants coming to the United States.