Mollie Tibbetts' alleged killer worked on farm under alias 'John Budd,' employees say

Mollie Tibbetts' accused killer was known on the dairy farm he worked on for years by a different name: John Budd.

Cristhian Bahena Rivera, a Mexican immigrant was in the country illegally, had been working for Yarrabee Farms in Brooklyn, Iowa, for the past four years under the alias, employees told CBS News.

Rivera reportedly presented out-of-state identification and a Social Security number when he was hired in 2014, CBS News reported, but he was not vetted by the federal E-Verify system.

Rivera, 24, was arrested on Aug. 21 after leading authorities to the body of the 20-year-old college student who had disappeared after going for a jog on July 18.

Rivera told police he stopped his car and ran alongside Tibbetts before she told him to leave her alone or she would call police, authorities said. 

21 PHOTOS
Missing Iowa student Mollie Tibbetts found dead
See Gallery
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)
HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

Rivera claimed he “blacked out” after that and later found Tibbetts' body in the trunk of his car, officials said. He then hid her remains among corn husks in a remote field, where she was later found. Rivera led authorities to Tibbetts' body after she'd been missing for nearly a month.

After Rivera was arrested in connection with the murder, President Trump took to Twitter to speak out on her death

“Mollie Tibbetts, an incredible young woman, is now permanently separated from her family,” Trump said as he stood on the White House lawn. "We need the wall.”

In response, Tibbetts' father, Rob Tibbetts, penned an impassioned op-ed asking people not to politicize his daughter's murder. 

“Do not appropriate Mollie’s soul in advancing views she believed were profoundly racist,” he wrote in the piece published by the Des Moines Register. “The act grievously extends the crime that stole Mollie from our family and is, to quote Donald Trump Jr., ‘heartless’ and ‘despicable’.”

RELATED STORIES

Mollie Tibbetts' Father Lashes Out at 'Profoundly Racist' Politicians Invoking His Daughter's Name

Mollie Tibbetts' Brother Leads High School Football Team to Emotional Victory After Her Death

Runners Dedicate Miles to Finish the Jog Mollie Tibbetts Started: 'She Will Not Be Forgotten'

Read Full Story