In February, the USDA's Food Safety and Inspection Service deemed the meat processed at the plant was not fit for human consumption after finding the plant processed diseased and unhealthy animals.
A USDA email obtained by CNN indicated the inspector assigned to the plant, Lynnette Thompson, was having an intimate affair with the plant foreman. The foreman's name wasn't reported.
The affair was reported to the USDA by an email from assistant Rancho plant manager.
"He said he went to her trailer three different times and they were intimate," the email said of the plant foreman. "She also sent him a picture of her naked back side in a tanning salon to his cell phone."
The email included text messages exchanged between Thompson and the foreman.
“I need a kiss later," Thompson wrote.
“Me to [sic],” he responded.
USDA rules state an inspector should not be assigned to a facility where "they are engaged in a personal relationship with an establishment employee."
Thompson had a bad relationship with the plant, complaining of its processing of cancerous cows, CNN reported.
A former owner of the facility said the relationship had nothing to do with the recall.